The astral world has many points in common with the physical; just like the physical, it presents different appearances to different people, and even to the same person at different periods of his career. It is the home of emotions and of lower thoughts; and emotions are much stronger in that world than in this. When a person is awake we cannot see that larger part of his emotion at all; its strength goes in setting in motion the gross physical matter of the brain. So if we see a man show affection here, what we can see is not the whole of his affection, but only such part of it as is left after all this other work has been done. Emotions therefore bulk far more largely in the astral life than in the physical. They in no way exclude higher thought if they are controlled, so in the astral world as in the physical a man may devote himself to study and to helping his fellows, or he may waste his time and drift about aimlessly. The astral world extends nearly to the mean distance of the orbit of the moon; but though the whole of this realm is open to any of its inhabitants who have not permitted the redistribution of their matter, the great majority remain much nearer to the surface of the earth. The matter of the different subdivisions of that world interpenetrates with perfect freedom, but there is on the whole a general tendency for the denser matter to settle towards the centre. The conditions are much like those which obtain in a bucket of water which contains in suspension a number of kinds of matter of different degrees of density. Since the water is kept in perpetual motion, the different kinds of matter are diffused through it; but in spite of that, the densest matter is found in greatest quantity nearest to the bottom. So that though we must not at all think of the various subdivisions of the astral world as lying above one another as do the coats of an onion, it is nevertheless true that the average arrangement of the matter of those subdivisions partakes somewhat of that general character. Astral matter interpenetrates physical matter precisely as though it were not there, but each subdivision of physical matter has a strong attraction for astral matter of the corresponding subdivision. Hence it arises that every physical body has its astral counterpart. If I have a glass of water standing upon a table, the glass and the table, being of physical matter in the solid state, are interpenetrated by astral matter of the lowest subdivision. The water in the glass, being liquid, is interpenetrated by what we may call astral liquid--that is, by astral matter of the sixth subdivision; whereas the air surrounding both, being physical matter in the gaseous condition, is entirely interpenetrated by astral gaseous matter--that is, astral matter of the fifth subdivision.