Knowledge must come through action; you can have no test which is not fanciful, save by trial.

You don’t have to depend on any material possessions, they depend on you, you create them, you own the one and only tool of production.

If you want to change the world, pick up your pen and write.

He who would learn to fly one day must first learn to stand and walk and run and climb and dance; one cannot fly into flying.

What you are is what you have been. What you will be is what you do now.

To furnish the means of acquiring knowledge is the greatest benefit that can be conferred upon mankind. It prolongs life itself and enlarges the sphere of human existence.

If a man empties his purse into his head, no man can take it away from him. An investment in knowledge always pays the best interest.

A primary object should be the education of our youth in the science of government. In a republic, what species of knowledge can be equally important? And what duty more pressing than communicating it to those who are to be the future guardians of the liberties of the country.

The desire of power in excess caused the angels to fall; the desire of knowledge in excess caused man to fall.

One cannot conceive anything so strange and so implausible that it has not already been said by one philosopher or another.

Nothing leads so straight to futility as literary ambitions without systematic knowledge.

Cherish that which is within you, and shut off that which is without; for much knowledge is a curse.

Teach the ignorant as much as you can; society is culpable in not providing a free education for all and it must answer for the night which it produces. If the soul is left in darkness sins will be committed. The guilty one is not he who commits the sin, but he who causes the darkness.

There is much pleasure to be gained from useless knowledge.

There is nothing so absurd or ridiculous that has not at some time been said by some philosopher.

The opposite is beneficial; from things that differ comes the fastest fairest attunement; all things are born through strife.

There will be obstacles. There will be doubters. There will be mistakes. But with hard work, there are no limits.

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

Feelings of worth can flourish only in an atmosphere where individual differences are appreciated, mistakes are tolerated, communication is open, and rules are flexible. The kind of atmosphere that is found in a nurturing family.

In school, you are given the lesson first. One the street, you're given the mistake first and then it's up to you to find the lesson, if you ever find it.

Knowledge rests not upon truth alone, but upon error also.

The successful man will profit from his mistakes and try again in a different way.