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

Good mathematics is not about how many answers you know... It is about how you behave when you don't know.

You'll never change your life until you change something you do daily. The secret to success and change in found in your daily routine.

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

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.

Dreams don't work unless you do.

It always seems impossible until it's done.

You cannot escape the responsibility of tomorrow by evading it today

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

Each day is an opportunity to improve. Aim to be that little bit better than yesterday and better tomorrow than today.

I think, therefore I am.

If you can understand just one thing thoroughly, then you will understand everything.

You can have results or excuses, not both

Go as far as you can see, when you get there, you’ll be able to see further

You cannot start the next chapter of your life if you keep re-reading the last one.