The Nature of Man (1921) by Abu Hamid al-Ghazālī. Translated in 1921 as part of Some Religious and Moral Teachings. Though man shares with the other animals external and internal senses, he is at the same time also endowed with two qualities peculiar to himself, knowledge and will. By knowledge is meant the power of generalisation, the conception of abstract ideas, and the possession of intellectual truths. By will is meant that strong desire to acquire an object which after due consideration of its consequences has been pronounced by reason to be good. It is quite different from animal desire, nay, it is often the very opposite of it.