Exuberance.

Exuberance is Beauty. If the lion was advised by the fox, he would be cunning. Improvement makes strait roads, but the crooked roads without Improvement, are roads of Genius. Sooner murder an infant in its cradle than nurse unacted desires. Where man is not nature is barren. Truth can never be told so as to be understood, and not be believ'd. Enough! or Too much!

William Blake, from Proverbs of Hell