Man is a child of the customs and the things he has become used to. He is not the product of his natural disposition and temperment. The conditions to which he has become accustomed, until they have become for him a quality of character and matters of habit and custom, have replaced his natural disposition.
Authentication Score 3
Citation
Khaldun, Ibn. مقدّمة ابن خلدون [The Muqaddimah]. 1377, bk. 1, ch. 2, sect. 5.