When a spirit has reached the end of the term assigned by Providence to his errant life, he chooses for himself the trials which he determines to und… - Allan Kardec

Spirits incarnate themselves as men or as women, because they are of no sex and, as it is necessary for them to develop themselves in every direction, both sexes, as well as every variety of social position. furnish them with special trials and duties, and with the opportunity of acquiring experience. A spirit who had always incarnated itself as a man would be only known by men, and vice versa.

Affections are more solid and lasting among spirits than among men, because they are not subordinated to the caprices of material interests and self-love.

You often say, 'I have had a strange dream, a frightful dream, without any likeness to reality' You are mistaken in thinking it to be so; for it is often a reminiscence of places and things which you have seen in the past, or a foresight of those which you will see in another existence, or in this one at some future time. The body being torpid, the spirit tries to break his chain, and seeks, in the past or in the future, for the means of doing so.