In fact, the American people did decide, back in 2012, when they elected me president of the United States.

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.

Even knowing, as I do now, that grace, power, and, yes, love can hide the darkest elements of the human heart, I would do it all again.

We were made for God. Only by being in some respect like Him, only by being a manifestation of His beauty, lovingkindness, wisdom or goodness, has any earthly Beloved excited our love.

The virtues of science are skepticism and independence of thought.

I wish that I had bridged the feminist movement and the anti-war movement better than I did.

Seriously, I have the best fans ever.

You can keep your memory intact, preserve your brain's health, and minimize the risk of aging and senile dementia, things that are greatly feared as people grow older.

The mind of a child is where the Revolution begins.

For since the fabric of the universe is most perfect and the work of a most wise Creator, nothing at all takes place in the universe in which some rule of maximum or minimum does not appear.

You have to do it by yourself. You can not do it alone.

In high school, I got smacked and kicked around. Two bloody noses. It was horrible.