Failure is simply an opportunity to begin again, this time more intelligently.

Man knows so much and does so little.

Nature never excuses lapses.

The fire that warms us can also consume us; it is not the fault of the fire.

To stumble twice against the same stone is a proverbial disgrace.

Failure is unimportant. It takes courage to make a fool of yourself.

Pollution is nothing but the resources we are not harvesting. We allow them to disperse because we've been ignorant of their value.

The errors of great men are venerable because they are more fruitful than the truths of little men.

Failure cannot cope with persistence.

The chief cause of failure and unhappiness is trading what you want most for what you want right now

Failure is the foundation of success, and the means by which it is achieved.

Do not be afraid of mistakes, providing you do not make the same one twice.

Great services are not canceled by one act or by one single error.

The worst prison would be a closed heart.

Any man can make mistakes, but only an idiot persists in his error.

If something's important enough, you should try. Even if you - the probable outcome is failure.

Dwelling on negative thoughts is like fertilizing weeds.

You will soon break the bow if you keep it always stretched.

Failing to prepare is preparing to fail.

But man is not made for defeat,'he said. 'A man can be destroyed but not defeated.

One of the most common causes of failure is the habit of quitting when one is overtaken by temporary defeat.