Large swaths of what we now regard as basic medical knowledge came originally from naturalists.

The Egyptians had the locusts and in the Middle Ages there was the Black Death with the rats, but tourists are the plague of our century and we'll not survive this one.

Among environmentalists sharing two or three beers, the notion is quite common that if only some calamity could wipe out the entire human race, other species might once again have a chance.

As an editor, I must often tell writers that their stories "do not fit our present needs." But there are times when I want to reply: "Sir, I would not trust you to write a ransom note."

Poverty should first be addressed in the mind because even if you give millions to a poor person, until there's a change of mindset, they will still remain the same.

How easy it is to do wrong when there is someone else to blame.

Always in the perfect moment in the best place. For one lesson more!

Where´s my leadin´ lady? Let me try this new love scene on you, baby.

Be not caught by the cunning of those who appear in a disguise.

if we have not found the heaven within,we have not found the heaven without

The point is, I'm weird, but I never felt weird.

Don't play games with me! You just killed someone I like, that is not a safe place to stand! I'm the Doctor, and you're in the biggest library in the Universe. Look me up.

People misinterpret what I say all the time: They think I'm being offensive, when really, I'm only being opinionated.

I'm not so much interested in the return ON my money as I am in the return OF my money.