Mathematics is the key and door to the sciences.
数学是科学的钥匙和门。
"The value of a man should be seen in what he gives and not in what he is able to receive."
We must listen to the whispers of the ancestors, for they hold the wisdom of the ages.
The greatest mysteries are those we create ourselves.
People are always blaming their circumstances for what they are. I don't believe in circumstances. The people who get on in this world are the people who get up and look for the circumstances they want, and, if they can't find them, make them.
The past is never dead. It's not even past.