Obama said if elected his government would "harness technology to confront the biggest challenges that America faces".

You can’t let your failures define you. You have to let your failures teach you.

Change will not come if we wait for some other person or some other time. We are the ones we've been waiting for. We are the change that we seek.

Keep exploring. Keep dreaming. Keep asking why. Don’t settle for what you already know. Never stop believing in the power of your ideas, your imagination, your hard work to change the world.

When ignorant folks want to advertise their ignorance, you don't really have to do anything, you just let them talk.

Just because we have the best hammer does not mean that every problem is a nail.

Change is never easy, but always possible.

Don’t ever let anybody tell you that your efforts don’t matter or that your voice doesn’t count. Don’t ever believe that you can’t make a difference. You have.

Where you are right now doesn't have to determine where you'll end up.

Learning to stand in somebody else's shoes, to see through their eyes, that's how peace begins. And it's up to you to make that happen. Empathy is a quality of character that can change the world.

If somebody is different from you, that's not something you criticize, that's something that you appreciate.

What stays with you longest and deepest? Of curious panics, of hard-fought engagements or sieges tremendous what deepest remains?

Christianity might be a good thing if anyone ever tried it.

Before there can be fullness there must be emptiness. Before God can fill us with Himself we must first be emptied of ourselves.

I'm clearly most well known for my music. Eventually, ultimately, I'll be writing books. I'm still writing articles now. I just consider myself a writer.

I like the idea of infiltrating an area that is not really exposed to me or my work.

Failure is an attitude, not an outcome.

Who can ever be alone for a moment in Italy? Every stone has a voice, every grain of dust seems instinct with spirit from the Past, every step recalls some line, some legend of long-neglected lore.

I've never gone to the bedroom when I was starting out and practiced away.

Psychedelics are probably responsible for every aspect of human evolution apart from the decline in bodyhair.

Would I rather be right, or would I rather be kind?