Chapter2— The Nourishment of the Person
All in the world know the beauty of the beautiful, and in doing this they have the idea of what ugliness is; they all know the skill of the skilful, and in doing this they have the idea of what the want of skill is. 2So it is that existence and non-existence give birth the one to the other; that difficulty and ease produce the one the idea of the other; that length and shortness fashion out the one the figure of the other.
— 2 —sacredatlas.org