"The only way to learn mathematics is to do mathematics."
学习数学的唯一方法就是做数学。
想象力是打开世界的钥匙。
真正的革命者是被伟大的爱所引导的。无法想象一个缺乏这种品质的真正革命者。
You have to reject one expression of the human condition before you get to the music.
I do not know what I may appear to the world， but to myself I seem to have been only like a boy playing on the sea-shore， and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary， whilst the great ocean of truth lay all undiscovered before me.