The established powers need our sadness to make us slaves. The tyrant, the priest, the captors of souls need to persuade us that life is hard and a burden. … In vain someone says, ‘Let’s dance’; we are not really very happy. … It is not easy to be free, to flee the plague, organize encounters, increase the power to act, to be moved by joy, to multiply the affects which express or encompass a maximum of affirmation.

Gilles Deleuze, Dialogues (via thusspakeblake)