不要担心你在数学上遇到的困难；我敢保证我遇到的困难比你还大得多。

It is easier to write an incorrect program than understand a correct one.

"To love is to risk not being loved in return. To hope is to risk pain. To try is to risk failure, but risk must be taken because the greatest hazard in life is to risk nothing."

The most powerful brand in the world is a story well told.