Innovation requires both creativity and rigorous testing.

The peculiar evil of silencing the expression of an opinion is that it is robbing the human race； posterity as well as the existing generation； those who dissent from the opinion， still more than those who hold it.

Every mathematical problem has a solution; sometimes it just takes time to find it.

真正的孤独不是一个人独处，而是在人群中依然感到孤独。