What words to comfort yourself when you are frustrated or what famous sayings hint at yourself?

if you don't come back in your prime, it's hard to get up in the morning. -Tao Qian

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

7. Before we know what life is, we have killed half of it. -Herbert

8. Life doesn't sell round-trip tickets. Once you leave, you can never return. -romain rolland

9. The value of life is not measured by time, but by depth. -lev tolstoy

1. I have never regarded ease and happiness as the purpose of life itself-this ethical basis, I call it the ideal of pigsty. -Ince