The soul prepares its own body, the body is not prepared for it without any reference to the soul. Are we then to suppose an eternal or continual Avatar himself evolving, we might say, his own fit mental and physical body according to the needs and pace of the human evolution and so appearing from age to age, yuge /yuge/? In some such spirit some would interpret the ten incarnations of Vishnu, first in animal forms, then in the animal man, then in the dwarf man-soul, Vamana, the violent Asuric man, Rama of the axe, the divinely-natured man, a greater Rama, the awakened spiritual man, Buddha, and, preceding him in time, but final in place, the complete divine manhood, Krishna, – for the last Avatar, Kalki, only accomplishes the work Krishna began, – he fulfils in power the great struggle which the previous Avatars prepared in all its potentialities. page 157, Essays on the Gita , volume – 13, SABCL