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。
I don't sing because I'm happy; I'm happy because I sing.
I am certain of nothing but the holiness of the heart's affections, and the truth of imagination.
解释:身居高位的人容易骄纵自满,处于安乐生活中的人容易奢侈。