Here's a collection of various quotes that I find interesting, motivating, and/or humbling:

Prevention is better than cure. — Unknown

I see now that the circumstances of one’s birth are irrelevant. It is what you do with the gift of life that determines who you are. — Mewtwo

I am, somehow, less interested in the weight and convolutions of Einstein’s brain than in the near certainty that people of equal talent have lived and died in cotton fields and sweatshops. — Stephen Jay Gould

[Blindly] following ancient customs and traditions does not mean the dead are alive, but that the living are dead. — Ibn Khaldun

Soon, you will have forgotten all things. Soon, all things will have forgotten you. — Marcus Aurelius

Perfect is the enemy of good. — Voltaire

Sapere aude. — Horace

Of all sad words of tongue or pen, the saddest are these, “It might have been.” — John Greenleaf Whittier

How lucky am I to have something that makes saying goodbye so hard. — Winnie-the-Pooh

It is important to draw wisdom from many different places. If you take it from only one place, it will become rigid and stale. — Uncle Iroh

Years of love have been forgot, in the hatred of a minute. — Edgar Allan Poe

Never doubt that a small group of committed people can change the world. Indeed it is the only thing that ever has. — Margaret Meade

Isn't it funny how day by day nothing changes but when we look back everything is different? — C. S. Lewis