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.

The relationship between men and women is deep and nuanced, and one entire book of the Writings -- Conjugial Love -- is devoted to the subject. So we can hardly offer a full explanation here. In a very general sense, though, the Writings say that men are creatures of intellect, driven by the love of growing wise; women, meanwhile are creations of affection, driven by the love of wisdom and the good that wisdom can do. They are formed this way to reflect the Lord's Divine Love and Divine Wisdom, and so that they can form marriages that reflect the unity of Divine Love and Divine Wisdom. Marking differences between men and women can be a touchy thing, but realistically it's easy to see that men tend to love acquiring knowledge whether it has any practical application or not. Many of them can spout out sports statistics or hold court on the workings of the internal combustion engine, even though it is knowledge they are not likely to ever use. They find such knowledge interesting for its own sake. It follows, then, that when the Bible speaks of men, the men represent facts, ideas, knowledge, truth, intellect and wisdom -- or in the negative sense falsity, twisted logic, and reasoning that is devoid of concern for others.