Tough times never last, but tough people do.

The master has failed more times than the beginner has even tried

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

There are no shortcuts to any place worth going.

Knowledge is of no value unless you put it into practice.

Don't fear failure, fear being in the same exact same place next year as you are now.

I think, therefore I am.

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

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.

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

Work like you don't need the money, dance like nobody's watching and love like you've never been hurt. 

Fall down seven times, stand up eight.

Yesterday is history, tomorrow is a mystery, but today is a gift—that's why it's called 'the present

We learn more from failure than we do from success.

The greatest enemy to human potential is your comfort zone