They can best be arranged in four main divisions: unselfish pursuit of spiritual knowledge; high philosophy or scientific thought; literary or artistic ability exercised for unselfish purposes; and service for the sake of service.
Even to this glorious heaven-life there comes an end, and then the mental body in its turn drops away as the others have done, and the man's life in his causal body begins.

Here the man needs no windows, for this is his true home and all his walls have fallen away.

The majority of men have as yet but very little consciousness at such a height as this; they rest dreamily unobservant and scarcely awake, but such vision as they have is true, however limited it may be by their lack of development.

Still, every time they return, these limitations will be smaller, and they themselves will be greater; so that this truest life will be wider and fuller for them.
As this improvement continues, this causal life grows, longer and longer, assuming an ever larger proportion as compared to the existence at lower levels.

And as he grows, the man becomes capable not only of receiving but also of giving.