A wise man said: before you speak, let your words pass through three gates. At the first gate, ask yourself, "Is it true?" At the second gate, ask "Is it necessary?" At the third gate, ask, "Is it kind?"
一位智者曾说:在你说话之前,让你的话经过三道门。在第一道门,问自己,“这是真的吗?”在第二道门,问,“这是必要的吗?”在第三道门,问,“这是善意的吗?”
There are no shadows in the dark. Shadows are servants of the light, children of fire.
The essence of mathematics lies in its freedom.