Failure to prepare = preparing to fail

You cannot escape the responsibility of tomorrow by evading it today

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

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

Just stick with it, what seems hard now will one day be your warm up.

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

The journey of a thousand miles begins with one step. 

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. 

Tough times never last, but tough people do.

Procrastination makes easy things hard and hard things harder.

The greatest glory in loving lies not in never falling, but in rising every time we fall.

Time is your friend, impulse is your enemy.

I have not failed, I've just found 10,000 ways that won't work.

It is never too late to become what you might have been