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

Work ethic is important, because, unlike intelligence, athleticism, or charisma, or any natural attribute, it’s a choice.

If you can understand just one thing thoroughly, then you will understand everything.

The wise person knows that no answer is also an answer

You can be shown the path, but only you can make the first step.

Do what you have always done and you will always be what you have always been

Success is not final and failure is not fatal. It is the courage to continue that counts.

You can have results or excuses, not both

Failure is not the opposite of success, it is part of the success.

Success can never happen without the journey (struggle).

Hard work beats talent when talent doesn't work hard.

Time is your friend, impulse is your enemy.

You can pick up a mistake and carry it as a burden,  or you can set it down as use it as a stepping stone to greatness.

Pure mathematics is in its way, the poetry of logical ideas.

Don't put off until tomorrow what you can do today. If today you have no time, it means tomorrow you'll be too tired and the next day you'll be something else.