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

Time is your friend, impulse is your enemy.

Skills are built not born.

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. 

A hero is no braver than an ordinary man, but he is braver five minutes longer.

Procrastination makes easy things hard and hard things harder.

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

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

We all make mistakes. What matters is how we choose to move forwards from them.

You cannot escape the responsibility of tomorrow by evading it today

Fall down seven times, stand up eight.

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

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.

Tough times never last, but tough people do.

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