The theory of evolution by cumulative natural selection is the only theory we know of that is in principle capable of explaining the existence of organized complexity.
Richard Dawkins

I won't accept anything less than the best a player's capable of doing... and he has the right to expect the best that I can do for him and the team!
Oliver Wendell Holmes

For in itself a thought, a slumbering thought, is capable of years, and curdles a long life into one hour.
Lord Byron

If I am capable of grasping God objectively, I do not believe, but precisely because I cannot do this I must believe.
Soren Kierkegaard

There is nothing with which every man is so afraid as getting to know how enormously much he is capable of doing and becoming.
Soren Kierkegaard

Men are often capable of greater things than they perform - They are sent into the world with bills of credit, and seldom draw to their full extent.
Horace Walpole

Original sin is that thing about man which makes him capable of conceiving of his own perfection and incapable of achieving it.
Reinhold Niebuhr

Neither sex, without some fertilization of the complimentary characters of the other, is capable of the highest reaches of human endeavor.
Jean-Paul Sartre

A moral being is one who is capable of reflecting on his past actions and their motives - of approving of some and disapproving of others.
Charles Darwin

Love alone is capable of uniting living beings in such a way as to complete and fulfill them, for it alone takes them and joins them by what is deepest in themselves.
Pierre Teilhard de Chardin

Capitalists are no more capable of self-sacrifice than a man is capable of lifting himself up by his own bootstraps.
Vladimir Lenin

I believe that man will not merely endure. He will prevail. He is immortal, not because he alone among creatures has an inexhaustible voice, but because he has a soul, a spirit capable of compassion and sacrifice and endurance.
William Faulkner

Money is human happiness in the abstract; he, then, who is no longer capable of enjoying human happiness in the concrete devotes himself utterly to money.
Arthur Schopenhauer

When you know what men are capable of you marvel neither at their sublimity nor their baseness. There are no limits in either direction apparently.
Henry Miller

To live without killing is a thought which could electrify the world, if men were only capable of staying awake long enough to let the idea soak in.
Henry Miller

Man seems to be capable of great virtues but not of small virtues; capable of defying his torturer but not of keeping his temper.
Gilbert K. Chesterton

Such happiness as life is capable of comes from the full participation of all our powers in the endeavor to wrest from each changing situations of experience its own full and unique meaning.
John Dewey

No temptation can gravitate to a man unless there is that is his heart which is capable of responding to it.
James Allen

The greatest minds are capable of the greatest vices as well as of the greatest virtues.
Rene Descartes

The limitless loving devotion to God, and the gift God makes of Himself to you, are the highest elevation of which the heart is capable; it is the highest degree of prayer. The souls that have reached this point are truly the heart of the Church.
Edith Stein