As everybody knows, while a man is alive in the world, it is the spirit, which both suffers pains and feels joys and happiness. Although the spirit feels pains, in appearance, through the nervous system and uses this system in its extremely complicated acts of communicating with all parts of the body down to each cell of it- it is still a mystery for science what type of an interaction there is between the spirit and the body, including, especially, the brain.

One day a number of bright youths came to me, seeking an effective deterrent in order to guard themselves against the dangers arising from life, youth, and the lusts of the soul. I told them that their youth will disappear and be lost if they transgress what is religiously unlawful. If you do not remain within the sphere of the licit, it will be lost, and rather than its pleasures, it will bring you calamities and suffering in this world, in the grave, and in the Hereafter. But if, you spend the bounty of your youth as thanks honorably, in uprightness and obedience, it will in effect remain perpetually and will be the cause of gaining eternal youth.