I think, therefore I am.

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

Knowledge is of no value unless you put it into practice.

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

A hero is no braver than an ordinary man, but he is braver five minutes longer.

99% of genius comes from hard work, the remaining 1% comes from innate talent

The easiest person to deceive is yourself.

You can hire a tutor but you can't hire someone to practice for you.

Everything that happens was once a dream.

You're not in competition with anyone but yourself. Outdo your past, not other people.

The bad news is time flies, the good new is that you're the pilot.

Tomorrow is worth more than yesterday but less than today.

Twenty years from now you will be more disappointed by the things you didn’t do than the things you did do

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

The greatest glory in loving lies not in never falling, but in rising every time we fall.