In a fast, the body tears down its defective parts and then builds anew when eating is resumed. – Herbert M. Shelton

I fast for greater physical and mental efficiency. – Plato

Fasting cleanses the soul, raises the mind, subjects one’s flesh to the spirit, renders the heart contrite and humble, scatters the clouds of concupiscence, quenches the fire of lust, and kindles the true light of chastity. Enter again into yourself. – Augustine of Hippo