We all have two lives. The second begins when we realise we only have one. 

99% of failures come from people who have the habit of making excuses.

Skills are built not born.

Dreams don't work unless you do.

Try and do one thing each day that you would really rather not do.

The journey of a thousand miles begins with one step. 

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

Tough times never last, but tough people do.

Everything that happens was once a dream.

Your limitation - its only your imagination.

Good mathematics is not about how many answers you know... It is about how you behave when you don't know.

Work ethic is important, because, unlike intelligence, athleticism, or charisma, or any natural attribute, it’s a choice.

The easiest person to deceive is yourself.

A book a day keeps the stupidity away.

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.