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.

183. Angels' Homes and Houses

Since there are communities in heaven, with people living there the way we do, they too have homes; and these vary depending on the state of the life of each individual. They are splendid for people who are especially deserving and less splendid for people who are of lower rank.

At times, I have talked with angels about homes in heaven, telling them that nowadays hardly anyone would believe that they have homes and houses - some because they do not see them, some because they do not realize that angels are people, some because they believe that the angelic heaven is the sky they see about them with their eyes. Since this appears to be empty and they think that angels are ethereal forms, they come to the conclusion that angels live in the ether. Further, they do not grasp the fact that the same kinds of thing exist in the spiritual world as in the natural, because they know nothing about the spiritual.

[2] Angels have told me that they were aware that this kind of ignorance was prevalent in the world nowadays and, remarkably enough, mainly within the church, and more among the intellectuals there than among the ones labeled simple. They have also said that people could know from the Word that angels are people because the ones that have been seen have been seen as people. So too was the Lord, who took on his full humanity. People could then realize that since angels are people, they have houses and homes and do not fly around in the air, that even though they are called "spirits" they are not breezes, as the ignorance (which angels call insanity) of some would have it. They could also grasp this if when they thought about angels and spirits they would step outside their preconceptions, which happens when they are not constantly questioning and consciously pondering whether this is so. Everyone actually has a general notion that angels are in human form and that they have homes that are called heavenly dwellings, which are more splendid than earthly houses. But this general notion (which comes from an inflow from heaven), the angels said, promptly collapses into nothing when it becomes the center of conscious attention and is faced with the question whether it is so. This happens particularly among scholars who have used their self-generated intelligence to shut off from themselves both heaven and the passage of light from it.

[3] Much the same happens in regard to faith in our life after death. People who talk about it without thinking at the same time from scholarly concepts of the soul or the doctrine of reunion with our physical bodies believe that after death we will live as people - among angels if we have lived well - and that then we will see magnificent sights and experience raptures. But the moment they focus on the doctrine of reunion with our bodies or some hypothesis about "the soul," and therefore begin to wonder whether the soul is really like this, whether it is all true, their former notion vanishes.