My first job as commander in chief is to keep the American people safe.

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.

Consider your origins: you were not made to live as brutes, but to follow virtue and knowledge.

Building on our Young South-east Asian Leaders Initiative, I'm hopeful that we can continue expand the ties and cooperation between our young people and students.

It's not fun to see myself in the mirror.

You can't convince anyone of anything. You can only give them the right information, so that they convince themselves.

I do think it's important to live in the present because in that way you won't be living in a state of regret.

Through the experience of memory, you recall what you have done, and you therefore attach yourself to it and perceive yourself through prior experience.

There was really nothing for serious men to do in cases of wild gossip, for superstitious rustics will say and believe anything.

There is probably no pleasure equal to the pleasure of climbing a dangerous Alp; but it is a pleasure which is confined strictly to people who can find pleasure in it.

Performing doesn't come that naturally to me, even though I've done it for years.

Generalization is necessary to the advancement of knowledge; but particularity is indispensable to the creations of the imagination.