All the great things are simple, and many can be expressed in a single word: freedom, justice, honor, duty, mercy, hope.

Someone told me that each equation I included in the book would halve the sales.

I have no special talent. I am only passionately curious.

The true sign of intelligence is not knowledge but imagination.

Change is the law of life. And those who look only to the past or present are certain to miss the future.

The world is the great gymnasium where we come to make ourselves strong.

Always bear in mind that your own resolution to succeed is more important than any other.

When your desires are strong enough you will appear to possess superhuman powers to achieve.

No man can succeed in a line of endeavor which he does not like.

Cherish your visions and your dreams as they are the children of your soul, the blueprints of your ultimate achievements.

The ladder of success is never crowded at the top.

The majority of men meet with failure because of their lack of persistence in creating new plans to take the place of those which fail.

Edison failed 10,000 times before he made the electric light. Do not be discouraged if you fail a few times.

Every adversity, every failure, every heartache carries with it the seed of an equal or greater benefit.

Always bear in mind that your own resolution to succeed is more important than any other.

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

It is no use saying, 'We are doing our best.' You have got to succeed in doing what is necessary.

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

The starting point of all achievement is desire.

I've failed over and over and over again in my life and that is why I succeed.

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

The difference between a successful person and others is not a lack of strength, not a lack of knowledge, but rather a lack of will.

Strive not to be a success, but rather to be of value.

In order to attain the impossible, one must attempt the absurd.

If everyone is moving forward together, then success takes care of itself.

The price of success is hard work, dedication to the job at hand, and the determination that whether we win or lose, we have applied the best of ourselves to the task at hand.

In order to attain the impossible, one must attempt the absurd.

Success depends upon previous preparation, and without such preparation there is sure to be failure.

Success consists of going from failure to failure without loss of enthusiasm.

Always be yourself, express yourself, have faith in yourself, do not go out and look for a successful personality and duplicate it.

However difficult life may seem, there is always something you can do and succeed at.

Success is not final, failure is not fatal: it is the courage to continue that counts.

Those who have knowledge, don't predict. Those who predict, don't have knowledge.

Correction does much, but encouragement does more.

Live as if you were to die tomorrow. Learn as if you were to live forever.

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

If you don't ask, you don't get.

You just can't beat the person who never gives up.

You must take action now that will move you towards your goals. Develop a sense of urgency in your life.

We should not give up and we should not allow the problem to defeat us.

The more things you do, the more you can do.

You must take action now that will move you towards your goals. Develop a sense of urgency in your life.

Setting goals is the first step in turning the invisible into the visible.

Do the difficult things while they are easy and do the great things while they are small. A journey of a thousand miles must begin with a single step.

Motivation is the art of getting people to do what you want them to do because they want to do it.

If you fell down yesterday, stand up today.

The will to succeed is important, but what's more important is the will to prepare.

There's a way to do it better - find it.

Failure will never overtake me if my determination to succeed is strong enough.