Cunning as a Serpent, Innocent as a Dove

http://www.artofmanliness.com/2012/07/08/the-art-of-worldly-wisdom/

Know how to appreciate: There’s no one who can’t be better than someone at something, and none who excel who can’t be excelled. Knowing how to enjoy the best in everyone is a useful form of knowledge. The wise appreciate everyone, recognizing the good in all and knowing how much it costs to do things well. Fools despise everyone because they are ignorant of the good and choose the worst.