I'll turn the page on a growing empire of classified information. We'll protect sources and methods, but we won't use sources and methods to hide the truth.

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.

Law is a jealous subject - It will require and consume all of you should you choose to pursue her.

Lost - yesterday, somewhere between sunrise and sunset, two golden hours, each set with sixty diamond minutes. No reward is offered, for they are gone forever.

Think with deep gratitude of those who have lighted the flames within us.

What are you looking at? Hale asked. Why are you smiling? I worry when you smile.

Where are the songs I used to know, Where are the notes I used to sing? I have forgotten everything I used to know so long ago. ("The Key-Note")

In really, really good science fiction the line between the science and the fiction is blurry.

Cosmology is serious business and in our hearts we are nothing if not cosmologists, hanging in a cold cage sifting the ruthless jewels of existence.

All governments like the ignorant, because their existence depends on them! If the society becomes wise, governments cannot survive, at least the bad ones cannot!

May Allah steal from you All that steals you from Him.

I think a lot of moral debates are not over what is the basis of justice, but who gets a ticket to play in the game.