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

Failure to prepare = preparing to fail

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

The gift of imperfection - let go of who you think you're supposed to be and embrace who you are.

There are no bad mistakes in maths, only discoveries.

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

Try and do one thing each day that you would really rather not do.

Fall down seven times, stand up eight.

It is never too late to become what you might have been

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

You can have results or excuses, not both

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

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.

Don’t confuse your path with your destination. Just because its stormy now doesn’t mean you are headed for failure.

I think, therefore I am.