Tomorrow is worth more than yesterday but less than today.

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.

Yesterday is history, tomorrow is a mystery, but today is a gift—that's why it's called 'the present

Nobody said it’d be easy, they just promised it would be worth it.

The wise person knows that no answer is also an answer

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

Don’t hang your targets after you’re done shooting.

The boxer is not afraid of being knocked down, he is afraid of not being able to get up again.

Life is full of opportunities. With every opportunity that is missed, another one is born.

The road to success is like a staircase. If you want to succeed, double your failure rate

Don't expect to be good at maths or understand things straight away. Be patient and persistent. Rome wasn't built in a day, but they worked on it every single day. 

I think, therefore I am.

The master has failed more times than the beginner has even tried

Don't be afraid to take an unfamiliar path.  Sometimes they're the ones that lead you to the best places.

There is no elevator to success, you have to take the stairs.