一个人只要愿意，就是自由的。
Man is free at the moment he wishes to be.
The greatest threat to our planet is the belief that someone else will save it.
Never stop learning, because the world never stops changing.
The human mind is capable of understanding the universe because it is a part of the universe.
预测未来的最好方式就是创造未来。
"Memory is the only paradise from which we cannot be expelled."