恐惧是自由的敌人。
对做好自己的事感到满足，不必理会别人如何议论你。
The true measure of success is not just profit, but the positive impact we leave behind.
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.
我觉得自己先是一个诗人，然后才是个音乐家。我活着像个诗人，死后也还是个诗人。
A proof tells us where to concentrate our doubts.