No one starts out on top. You have to work your way up.

The greatest enemy to human potential is your comfort zone

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

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. 

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

Success is the sum of small repeated efforts, day in and day out.

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

Tough times never last, but tough people do.

I think, therefore I am.

The temptation to quit will be the greatest when you are about to succeed

Nothing is impossible if you want it badly enough. Impossible = I'm possible.

It is never too late to turn an unproductive day into a productive one.

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

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

The journey of a thousand miles begins with one step.