The purpose of existing as a human being on this planet is to know through doing. By doing, we acquire knowledge. A person who has not experienced something simply does not know what that thing is.
If something excites you, do it. If there is something you think about all the time—something that intrigues you or even scares you—then that is something you must start doing now. Are you afraid? Fear prevents you from living fully by stopping you from doing.
Do you want to know what love is? Fall in love. Do you want to know what it feels like to perform on stage? Do it. Do you have some big idea that might change the world? Get started and do not look back. You may not succeed, but what matters is that you will come away with the knowledge of what that thing is (and is not).
Reading about something is not enough. Talking about, debating, and writing about something brings you no further to true knowledge. Do, become, experience whatever it is that excites you.
Doing is knowing.
More quotes from the book:
Only a blind man can easily describe the light.
The moment you enter love, you enter a different person. That is called rebirth.