Work on your weaknesses until they are your strengths and work on your strengths until they are second nature.

The journey of a thousand miles begins with one step.

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

Instead of finding reasons why you can't, find reasons why you can.

He who has begun his task is half-way done. Have the courage to begin!

We all have two lives. The second begins when we realise we only have one. 

We learn more from failure than we do from success.

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

Don’t compare yourself to others. Compare yourself to the person you were yesterday.

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

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

I can is 100 times more important than IQ.

I have not failed, I've just found 10,000 ways that won't work.

The greatest enemy to human potential is your comfort zone

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.