实现明天理想的唯一障碍是今天的疑虑。
我无法预测未来,但我可以创造未来。
朗道学派不仅仅是一个物理学派,它是一个生活的学派。
True happiness arises, in the first place, from the enjoyment of one's self, and in the next, from the friendship and conversation of a few select companions.