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.

There are no bad mistakes in maths, only discoveries.

The greatest mistake we make is living in constant fear that we will make one.

We learn more from failure than we do from success.

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

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

No one starts out on top. You have to work your way up.

Success is not final, failure is not fatal.  It is the courage to continue that counts.

You can be shown the path, but only you can make the first step.

If you want to succeed, double your failure rate.

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

It always seems impossible until it's done.

Practice like you’ve never won. Perform like you’ve never lost.

Success can never happen without the journey (struggle).

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