Procrastination makes easy things hard and hard things harder.

Everything you want is on the other side of fear

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

Time is your friend, impulse is your enemy.

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

Success is a journey, not a destination.

Tough times never last, but tough people do.

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

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.

I think, therefore I am.

There is no elevator to success, you have to take the stairs.

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. 

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

You cannot escape the responsibility of tomorrow by evading it today

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