What is life like in the spirit world?

We have some difficulty in understanding why some spirits should appear in an aged form, such as you appear in, and others in all the strength and beauty of manhood.

I still appear in the form I last had on earth. There is nothing compulsory in this—we are not forced to assume such forms. But is the appearance of old age not as beautiful as that of youth?

That is not exactly what I am referring to. I allude to decrepitude, which is often seen in old age.

The spirit is not decrepit. The mortal body may be, and often is before the spirit leaves, but the spirit is straight as an arrow. Many poor spirits are imprisoned in mortal bodies where they are cramped and cannot work, but once quit of their bodies they are all right. They are at liberty—free! Take the case of an idiot. You may imagine in your ignorance that the spirit in such circumstances remains undeveloped. It is not so. It has gained a thousand times greater experience than many who are in possession of all their senses, and has become fit to dwell with saints, not with devils. 

And so it is with the aged. The body may be weak, deformed, deprived of hearing, sight or feeling, but these defects are left behind—they all pass off by what you call death.

—Hafed, Prince of Persia