The purpose of abstraction is not to be vague, but to create a new semantic level in which one can be absolutely precise.
抽象的目的不是模糊，而是创建一个新的语义层次，在这个层次上可以绝对精确。
Sometimes, the wicked will tell us things just to confuse us–to haunt our thoughts long after we've faced them.
It is during our darkest moments that we must focus to see the light.
Psychology must be based on observable phenomena, not abstractions.