“There can be no life without change, and to be afraid of what is different or unfamiliar is to be afraid of life.”

Every reform movement has a lunatic fringe.

The best executive is the one who has sense enough to pick good men to do what he wants done, and self-restraint to keep from meddling with them while they do it.

It is no use to preach to children if you do not act decently yourself.

To educate a person in the mind but not in morals is to educate a menace to society.

Every immigrant who comes here should be required within five years to learn English or leave the country.

The lack of power to take joy in outdoor nature is as real a misfortune as the lack of power to take joy in books.

Nine tenths of wisdom consists in being wise in time.

Be practical as well as generous in your ideals.

Great corporations exist only because they are created and safeguarded by our institutions; and it is therefore our right and duty to see that they work in harmony with these institutions.

Far and away the best prize that life has to offer is the chance to work hard at work worth doing.

I am an American; free born and free bred, where I acknowledge no man as my superior, except for his own worth, or as my inferior, except for his own demerit.

Conservation means development as much as it does protection.

If you could kick the person in the pants responsible for most of your trouble, you wouldn’t sit for a month.

Nothing in the world is worth having or worth doing unless it means effort, pain, difficulty.

We are the heirs of the ages.

I put myself in the way of things happening, and they happened.

The most powerful natural species are those that adapt to environmental change without losing their fundamental identity which gives them their competitive advantage.

You must always be evolving and able to adapt and overcome any and all obstacles!

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

Life, it turns out, is infinitely more clever and adaptable than anyone had ever supposed.

In the struggle for survival, the fittest win out at the expense of their rivals because they succeed in adapting themselves best to their environment.

It is not the strongest of the species that survives, not the most intelligent that survives. It is the one that is the most adaptable to change.

My career should adapt to me. Fame is like a VIP pass wherever you want to go.

Intelligence is the ability to adapt to change.