Feet Hands and Mind
Said the Koretzer: "Humanity may be likened to the form of a man. Israel is the head, since his importance lies in the achievements of his mind. Other nations are the hands, since they are valuable for their manual works. Animals are the feet, since their worth derives from their feet.
"A man's life may also be compared to the form of a man. In his youth his strength is in his feet; in middle age, in his hands; in old age, in his head."
Source: Midrash Pinchas