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.

Time is your friend, impulse is your enemy.

I think, therefore I am.

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

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

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

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

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

1.00³⁶⁵=1 and 1.01³⁶⁵=37.7. Doing nothing at all versus small steps at a time. 

Success is the sum of small repeated efforts, day in and day out.

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

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

Success is a journey, not a destination.

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

Tough times never last, but tough people do.