Positive and negative emotions cannot occupy the mind at the same time.

Nothing is more tragic - or more common - than mental inertia.

We see men who have accumulated great fortunes, but we often recognize only their triumph, overlooking the temporary defeats which they had to surmount before arriving.

You can be absolutely certain that when you feel you are being most unfairly tested, you are being prepared for great achievement.

The only thing over which you have complete right of control at all times is your mental attitude.

Every adversity contains, at the same time, a seed of equivalent opportunity!

If the thing you wish to do is right, and you believe in it, go ahead and do it!