Focus on progress, not perfection. Practise a little bit every day - little and often  Slow and steady wins the race.

Failure to prepare = preparing to fail

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

Never underestimate the importance of small steps. small steps = big changes. 

You cannot escape the responsibility of tomorrow by evading it today

Everything you want is on the other side of fear

There are no shortcuts to any place worth going.

Skills are built not born.

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

Success is a journey, not a destination.

Mathematics Is not a spectator sport. The only way to learn mathematics is to do mathematics.

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

I think, therefore I am.

The journey of a thousand miles begins with one step.

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