With highly civilised nations continued progress depends in a subordinate degree on natural selection; for such nations do not supplant and exterminate one another as do savage tribes.

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!

Muscles aching to work, minds aching to create - this is man.

All things are possible if you believe...

We suffer each other to have each other a while.

People's most common regret was living the life others expected of them, rather than having the courage to live a life true to themselves, and realising some dreams had gone unfulfilled as a result.

Hope is the only good that is common to all men those who have nothing else possess hope still.

The more we know, the better our intuitions.

Attachment constrains our vision so that we are not able to see things from a wider perspective.

The world needs women to redefine what it means to be a person of power

I don't think Republicans will be fooled into taking this necessary spending and using it to oppose pro-growth tax cuts, using this tragedy and those deaths for his own political desires.

Hypocrites always wanna play innocent