Beyond Good and Evil by Friedrich Nietzsche Chapter 2 Page 20

31. In our youthful years we still venerate and despise without the art of NUANCE, which is the best gain of life, and we have rightly to do hard penance for having fallen upon men and things with Yea and Nay.

Everything is so arranged that the worst of all tastes, THE TASTE FOR THE UNCONDITIONAL, is cruelly befooled and abused, until a man learns to introduce a little art into his sentiments, and prefers to try conclusions with the artificial, as do the real artists of life. The angry and reverent spirit peculiar to youth appears to allow itself no peace, until it has suitably falsified men and things, to be able to vent its passion upon them: youth in itself even, is something falsifying and deceptive. Later on, when the young soul, tortured by continual disillusions, finally turns suspiciously against itself —