There are two tragedies in life: one is despair, the other is complacency. ---- Bernard Shaw

2. People who understand the true meaning of life can extend the short life. ----Cicero

3. Don’t look at the past with sentimentality, because the past will never come back. The smartest way is to deal with your present well. The present is in your hands. In your hands, you must welcome the dreamlike future with an upright manly spirit. ----Longfellow

4. Making a person's limited life more effective is equivalent to extending a person's life. ----Lu Xun

5. The prime of life will never come back again, and it will be difficult for one day to wake up again. ---- Tao Qian

6. Life is long-lasting as long as you make full use of it. ----Seneca

7. Before we understand what life is, we have consumed half of it. ---- Herbert

8. Life does not sell round-trip tickets. Once you leave, you can never come back. ----Romain Rolland

There are many more, see for yourself