—— 请按键盘 空白键 开始游戏 ——

I would not dare to say that there is a direct relation between mathematics and madness, but there is no doubt that great mathematicians suffer from maniacal characteristics.
Truth is what stands the test of experience.
A person may cause evil to others not only by his actions but by his inaction, and in either case, he is justly accountable to them for the injury.