概率论是我们处理不确定性的唯一工具。

科学是人类思想最伟大的冒险。

The state, therefore, has not existed from all eternity. There have been societies that did without it, that had no notion of the state or state power. At a certain stage of economic development, which was necessarily bound up with the split of society into classes, the state became a necessity.

君子的为人之道是：外表暗淡无色而美德日见彰显。小人的为人之道是：外表色彩鲜明，但渐渐地消失了。君子的为人之道还在于：外表素淡而不使人厌恶，简朴而有文采，温和而又有条理，知道远是从近开始的，知道教化别人从自己做起，知道隐微的东西会逐渐显露，这样就进入圣人的美德中了。