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

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

There are no bad mistakes in maths, only discoveries.

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.

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

You can have results or excuses, not both

Hard work beats talent when talent doesn't work hard.

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

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

Don't be afraid to take an unfamiliar path.  Sometimes they're the ones that lead you to the best places.

You cannot escape the responsibility of tomorrow by evading it today

If you really want something you’ll find a way. If you don’t you’ll find an excuse.

Skills are built not born.