Do not reveal what you have thought upon doing, but by wise council keep it secret being determined to carry it into execution.

Not everything that can be counted counts, and not everything that counts can be counted.

Science is organized knowledge. Wisdom is organized life.

Man is not the creature of circumstances, Circumstances are the creatures of men.

The difference between stupidity and genius is that genius has its limits.

Those who cannot work with their hearts achieve but a hollow, half-hearted success that breeds bitterness all around.

What a man does for others, not what they do for him, gives him immortality.

Yesterday I was clever, so I wanted to change the world. Today I am wise, so I am changing myself.

Only from the heart can you touch the sky.

In anger we should refrain both from speech and action.

Drop the idea that you are Atlas carrying the world on your shoulders. The world would go on even without you. Don't take yourself so seriously.

It is not enough to have a good mind; the main thing is to use it well.

Promises are like crying babies in a theater, they should be carried out at once.

Reality leaves a lot to the imagination.

Courage is resistance to fear, mastery of fear - not absence of fear.

Our virtues and our failings are inseparable, like force and matter. When they separate, man is no more

If we know exactly where we're going, exactly how to get there, and exactly what we'll see along the way, we won't learn anything.

One new feature or fresh take can change everything.

Courage, above all things, is the first quality of a warrior.

Nature is pleased with simplicity. And nature is no dummy

It is necessary to keep one's compass in one's eyes and not in the hand, for the hands execute, but the eye judges.