The true test of a mathematical idea is its ability to inspire further questions.
数学思想的真正考验是它能否激发更多的问题。
Immediately pay what you owe to vendors， workers， contractors. They will go out of their way to work with you first next time.
Life's too short to be anything but happy.
永远不要停止学习，因为生活永远不会停止教导。