The knowledge of anything, since all things have causes, is not acquired or complete unless it is known by its causes.

Let us tenderly and kindly cherish, therefore, the means of knowledge. Let us dare to read, think, speak, and write.

“You always pass failure on the way
to success.”

Real knowledge is to know the extent of one's ignorance.

A people free to choose will always choose peace.

Knowledge is power. Information is liberating. Education is the premise of progress, in every society, in every family.

Innovation distinguishes between a leader and a follower.

The minute that you're not learning I believe you're dead.

Give light, and the darkness will disappear of itself.

A positive attitude is something everyone can work on, and everyone can learn how to employ it.

Perfection is not attainable, but if we chase perfection we can catch excellence.

We are going to have peace even if we have to fight for it.

To know that we know what we know, and to know that we do not know what we do not know, that is true knowledge.

Genius always finds itself a century too early.

Human behavior flows from three main sources: desire, emotion, and knowledge.

All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.

All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.

Success is never final, failure is never fatal. It's courage that counts.

The true sign of intelligence is not knowledge but imagination.

You cannot open a book without learning something.

Satisfaction consists in freedom from pain, which is the positive element of life.

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

Having knowledge but lacking the power to express it clearly is no better than never having any ideas at all.

All our knowledge begins with the senses, proceeds then to the understanding, and ends with reason. There is nothing higher than reason.

Knowledge is power. Information is liberating. Education is the premise of progress, in every society, in every family.

Education is the passport to the future, for tomorrow belongs to those who prepare for it today.

Never, never, never give up.

Knowledge is knowing that we cannot know.

Experience without theory is blind, but theory without experience is mere intellectual play.

Positive thinking will let you do everything better than negative thinking will.

Be miserable. Or motivate yourself. Whatever has to be done, it's always your choice.

Optimism is the faith that leads to achievement. Nothing can be done without hope and confidence.

Strong and bitter words indicate a weak cause.

Perhaps I am stronger than I think.

There is little that can withstand a man who can conquer himself.

Out of suffering have emerged the strongest souls; the most massive characters are seared with scars.

Do not let what you cannot do interfere with what you can do.

Silence is a source of great strength.

It doesn't take a lot of strength to hang on. It takes a lot of strength to let go.

No one saves us but ourselves. No one can and no one may. We ourselves must walk the path.

Strength and growth come only through continuous effort and struggle.

Success is a science; if you have the conditions, you get the result.

Pray that success will not come any faster than you are able to endure it.

Success - keeping your mind awake and your desire asleep.

Don't be afraid to give your best to what seemingly are small jobs. Every time you conquer one it makes you that much stronger. If you do the little jobs well, the big ones will tend to take care of themselves.

Never put off till tomorrow what you can do the day after tomorrow.

Success is a science; if you have the conditions, you get the result.

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

Success is dependent on effort.

Science is the highest personification of the nation because that nation will remain the first which carries the furthest the works of thought and intelligence.