Climate change is happening, humans are causing it, and I think this is perhaps the most serious environmental issue facing us.

Everyone you will ever meet knows something you don't.

We are just a speck, on a speck, orbiting a speck, in the corner of a speck, in the middle of nowhere.

To leave the world better than you found it, sometimes you have to pick up other people's trash.

Science is the best idea humans have ever had. The more people who embrace that idea, the better.

You and I are made of stardust. We are the stuff of exploded stars. We are therefore, at least 1 way that the Universe knows itself. That, to me, is astonishing.

There's nothing I believe in more strongly than getting young people interested in science and engineering, for a better tomorrow, for all humankind.

I speak with dogs frequently. They don't really talk, but I feel they're communicating.

The natural world is a package deal; you don't get to select which facts you like and which you don't.

The more you find out about the world, the more opportunities there are to laugh at it.

Science is the best thing humans beings have ever come up with. And if it isn't, science will fix it.

If you are facing problems in your life, be strong you will going to make better future.

Happiness is a choice not a result of something you do.

Wisdom alone is true ambition's aim, wisdom is the source of virtue and of fame; obtained with labour, for mankind employed, and then, when most you share it, best enjoyed.

A youth's knowledge is like a cheap shotgun-likely to do as much damage to the owner as to the game.

Even the most time-honoured truths do not have to be accepted until they are your truths.

The recycling of resource by the aggregate behavior of a diverse array of agents is much more than the sum of the individual actions.

Twenty thousand birds moved away from me as one, like a ground-hugging white cloud, clucking softly.

Please God, let me hit one. I'll tell everybody you did it.

What we've got here is failure to communicate. Some men you just can't reach.

The Gospel is this: You're more sinful, evil and weak than you'd ever believe. But you're more valued, accepted and loved than you dared hope.