By the delusions of imagination, touch and sight, And by eating, drinking, and impregnation there is a birth and development of the self. According to his deeds (karma)) the embodied one successively Assumes forms in various conditions. Coarse and fine, many in number, The embodied one chooses forms according to his own qualities. Each subsequent cause of his union with them is seen to be Because of the quality of his acts and of himself.

(The Upanishads)