The first altar mentioned in the Word was the one built by Noah after he came out of the ark, after being saved from the great flood. On that altar, he sacrificed clean animals to the Lord.

Mountains represent the Lord because of their height; we need to raise our thoughts above worldly things when "talking" with the Lord. An altar is a small artificial mountain. When it's used in worship, it can call to mind this raising of thought. The fire and smoke that rise from an altar are symbolically being sent to the Lord.

Most altars were made from unhewn stones. Stones represent truths. Unhewn stones - ones that have not been shaped by men - represent truths from the Word, truths that have not been adulterated.

The clean beasts to be sacrificed represent good things, charitable acts done because they are right. The clean birds represent thoughts about doctrine and actions, and about what is right. Presenting these things is an acknowledgment that we have them from the Lord, and a giving thanks to Him for them.

In the Israelitish Tabernacle, the altar of burnt offering represented the acknowledgment of good and the altar of incense that of truth. For this reason this larger altar, which was outside by the door, was made of brass which signifies natural good, while the altar of incense was made of gold, which signifies love to the Lord from whom comes truth.

134. "'To teach and seduce My servants to commit sexual immorality.'" This symbolically means, in consequence of which faith the truths of the church are falsified.

To teach and seduce the Lord's servants means, symbolically, to teach and seduce people who can be and are willing to be instructed in truths from the Word. That servants of the Lord are what people governed by truths are called may be seen in nos. 3 and 128 above; and to commit sexual immorality means, symbolically, to adulterate and falsify the Word. To commit sexual immorality has this symbolic meaning because every particular of the Word contains a marriage of good and truth, and this marriage is broken when goodness is divorced and estranged from truth.

To be shown that every particular of the Word contains a marriage of good and truth, see The Doctrine of the New Jerusalem Regarding the Sacred Scripture, nos. 80-90. It is because of this that to commit sexual immorality means, symbolically, to adulterate the goods of the Word and falsify its truths. Moreover, because this is spiritual licentiousness, therefore people who have employed their own reason to falsify the Word become sexually licentious people when they enter the spiritual world after death. And something as yet unrecognized in the world is the fact that people who have affirmed faith alone to the exclusion of any works of charity are prompted by the lust of an adultery of a son with his mother. In the spiritual world I have often perceived them to be impelled by the lust of so unspeakable an adultery. Remember this and inquire into it after death, and you will be convinced. I have not dared to reveal this previously, because it offends the ears.

[2] This adultery is symbolized by the adultery of Reuben with Bilhah, his father's concubine (Genesis 35:22), inasmuch as Reuben symbolizes that faith. Therefore he was cursed by his father Israel, and the birthright was subsequently taken from him. For in prophesying concerning his sons, his father Israel said of Reuben,

Reuben, you are my firstborn, My might and the beginning of my strength... Unstable as water, you shall not excel, because you went up to your father's bed, then defiled it. He went up to my pallet. (Genesis 49:3-4)

And therefore the birthright was taken from him:

...Reuben (was) the firstborn of Israel..., but because he defiled his father's pallet, his birthright was given to the sons of Joseph... (1 Chronicles 5:1)

We will see in the explanation of Revelation 7:5 that Reuben represented truth arising from good or faith springing from charity, and afterward truth divorced from good or faith divorced from charity.

[3] That references to sexual licentiousness in the Word symbolize adulterations of good and falsifications of truth can be seen from the following passages:

...when Joram saw Jehu, he said, "Is it peace, Jehu?" And he said, "What peace, as long as the harlotries of your mother Jezebel and her witchcraft are many?" (2 Kings 9:22)

The harlotries of Jezebel do not mean any acts of licentiousness, but her deeds, as cited in no. 132 above.

Your sons shall be shepherds in the wilderness forty years, and bear your whoredoms... (Numbers 14:33)

The person who has regard to mediums and soothsayers, to go whoring after them..., I will cut him off... (Leviticus 20:6)

(Do not) make a covenant with the inhabitants of the land, (lest) they go whoring after their gods... (Exodus 34:15).

(Jerusalem,) you trusted in your own beauty and played the harlot because of your fame, (so that) you poured out your harlotries on everyone passing by... You also committed harlotry with the Egyptians, your very carnal neighbors, and multiplied your acts of harlotry... You also played the harlot with the Assyrians, because you were insatiable, (with whom) you played the harlot... You multiplied your harlotry as far as... Chaldea... The adulterous woman, who in place of her husband takes strangers. All men give payment to their harlots, but you made your payments to them all, (that they may) come to you from all around for your harlotries... Therefore, harlot, hear the word of Jehovah. (Ezekiel 16:15-16, 26, 28-29, 32-33, 35ff.)

Jerusalem there is the Israelite and Jewish Church. Its harlotries mean adulterations and falsifications of the Word. And because Egypt symbolizes the knowledge of the natural self, Assyria reasoning on the basis of it, Chaldea the profanation of truth, and Babel the profanation of good, therefore the passage says that it played the harlot with them.

[4] ...two women, the daughters of one mother, committed harlotry in Egypt; in their youth they committed harlotry... (One,) my subject, played the harlot, and she doted on her lovers, the neighboring Assyrians... She committed her harlotries with them... (Yet) she has not given up her harlotries in Egypt....

(The other) became more corrupt in her loving than she, and in her harlotries more corrupt than her sister's harlotries... She increased her harlotries... She loved (Chaldeans).... Then the Babylonians came to her, to the bed of love, and they defiled her with their harlotry. (Ezekiel 23:2-3, 5, 7-8, 11, 14, 16-17ff.)

The two daughters of the same mother are likewise the Israelite and Jewish Church, whose adulterations and falsifications of the Word are described here, as above, by harlotries.

[5] So, too, in the following passages:

...you have played the harlot with many lovers... You have profaned the land with your harlotries and your wickedness... Have you seen what backsliding Israel has done? She has gone up on every high mountain and... played the harlot... Treacherous Judah... went and played the harlot also. So that... by the report of her harlotry she defiled the land; ...she committed adultery with stone and wood. (Jeremiah 3:1-2, 6, 8-9)

And elsewhere:

Run to and fro through the streets of Jerusalem, and see... if you can find a man... who executes judgment and seeks the truth... I satiated them, and they committed harlotry and came by troops into the harlots' house. (Jeremiah 5:1, 7)

I have seen your adulteries... your neighings, the wickedness of your harlotry, your abominations on the hills in the fields. Woe to you, O Jerusalem! You will not be made clean... (Jeremiah 13:27)

I have seen a horrible obstinacy in the prophets of Jerusalem: they commit adultery and walk in a lie. (Jeremiah 23:14)

...they have committed folly in Israel, have committed adultery..., and have spoken (My) word in My name falsely... (Jeremiah 29:23)

...they sinned against Me; I will change their glory into disrepute... They committed harlotry..., because they have forsaken Jehovah. Harlotry... enslaved (their) heart... ...your daughters commit harlotry, and your daughters-in-law commit adultery. (Hosea 4:7, 10-11, 13)

I know Ephraim..., (that) he has (altogether) committed harlotry, (and) Israel is defiled. (Hosea 5:3)

I have seen a horrible thing in the house of Israel: Ephraim committed harlotry there, (and) Israel is defiled. (Hosea 6:10)

Israel there is the church, and Ephraim is its understanding of the Word, from which and in accordance with which the church is formed. Therefore Ephraim is said to have committed harlotry and Israel to be defiled.

[6] Since the church had falsified the Word, the prophet Hosea was commanded to take himself a harlot as a wife, as follows:

...take yourself a woman of harlotries and children of harlotries, for the land has committed great harlotry behind Jehovah. (Hosea 1:2).

Again:

...love a woman who is loved by a companion and is an adulteress... (Hosea 3:1)

Since the Jewish Church was such as described, therefore the Lord called the Jewish nation an adulterous generation (Matthew 12:39; 16:4, Mark 8:38); and in Isaiah, the offspring of an adulterer (Isaiah 57:3).

In Nahum:

Woe to the bloody city! Full of lying... The multitude of the slain... because of the multitude of the harlotries of the harlot..., who sells nations through her harlotries... (Nahum 3:1, 3-4)

[7] Since Roman Catholicism adulterates and falsifies the Word more than any others in the Christian world, it is therefore called Babylon, the Great Harlot, and the following things are said of it in the book of Revelation:

Babylon... has made all nations drink of the wine of the wrath of her harlotry. (Revelation 14:8)

(Babylon has made) all the nations (drink) of the wine of the wrath of her harlotry, and the kings of the earth have committed harlotry with her... (Revelation 18:3)

(The angel said,) "Come, I will show you the judgment of the great harlot... with whom the kings of the earth committed harlotry. (Revelation 17:1-2)

...He has judged the great harlot who corrupted the earth with her harlotry. (Revelation 19:2)

It is apparent from this now that to commit adultery and to commit sexual immorality mean, symbolically, to adulterate and falsify the goods and truths of the Word.