The secret of success is constancy of purpose.

Keep your mind off the things you don’t want by keeping it on the things you do want.

What signifies knowing the names, if you know not the nature of things?

The way you habitually think will determine your destiny.

Success is simple. Do what's right, the right way, at the right time.

The season of failure is the best time for sowing the seeds of success.

What I wanted was to be allowed to do the thing in the world that I did best, which I believed then and believe now, is the greatest privilege there is. When I did that, success found me.

Think twice before you speak, because your words and influence will plant the seed of either success or failure in the mind of another.

Before a man can accomplish anything of an enduring nature in the world, he must first of all acquire some measure of success in the management of his own mind.

Everything an Indian does is in a circle, and that is because the power of the world always works in circles, and everything tries to be round. In the old days when we were a strong and happy people, all our power came to us from the sacred hoop of the nation, and so long as the hoop was unbroken the people flourished.

The measure of success is not whether you have a tough problem to deal with, but whether it's the same problem you had last year.