The expression often used by Mr. Herbert Spencer of the "Survival of the fittest" is more accurate and is sometimes equally convenient.

The love for all living creatures is the most noble attribute of man.

A man who dares to waste one hour of time has not discovered the value of life.

The world will not be inherited by the strongest, it will be inherited by those most able to change.

Nothing exists for itself alone, but only in relation to other forms of life

Building a better mousetrap merely results in smarter mice.

A mathematician is a blind man in a dark room looking for a black cat which isn't there.

An American monkey, after getting drunk on brandy, would never touch it again, and thus is much wiser than most men.

It is not the biggest, the brightest or the best that will survive, but those who adapt the quickest.

We can allow satellites, planets, suns, universe, nay whole systems of universes, to be governed by laws, but the smallest insect, we wish to be created at once by special act.

What a book a devil's chaplain might write on the clumsy, wasteful, blundering, low, and horribly cruel work of nature!

Often the most tricky questions are the ones we secretly know the answers of.What are you running from?What are you waiting for?

It is a characteristic of pleasure that we can never recognize it to be pleasure till after it is gone.

The most important of all revolutions, a revolution in sentiments, manners and moral opinions.

I'll be ready for my first kiss! When it happens, it'll happen, but I don't know. It doesn't look like that will be anytime soon.

You don't want your relationship to be in the press, but at the same time, and this is only a theory, the more you try and keep it secret, the more the media tries to crack it open.

Everybody has an inside scoop, so just be a nice guy. Be a nice person.

It's time to save the U.N. from its own scandals and mismanagement. It's time for U.N. Reform with teeth.

We look at each one [project] and consider the context - what it is and what it can be - beyond the strictly functional concerns.

Credentialed ignorance is still ignorance.

The 'look of love' not only communicates our feeling of love for someone but also reflects our instinct to do whatever it takes to make that person happy.