Wasting time is a cardinal sin. ——Rousseau Do you love life? So don't waste time, because time is the material that makes up life - Franklin's prime years will not come back again, and it will be difficult to wake up again. Encourage yourself in time, and time waits for no one - Tao Yuanming There is a long time between today and tomorrow; learn to do things quickly while you still have the energy - Goethe must remember that our learning time is limited. Time is limited, not only because life is short, but also because people are complicated. We should strive to do the most beneficial things with all our time.

—— Spencer: "Education"