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

Success is a journey, not a destination.

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

99% of genius comes from hard work, the remaining 1% comes from innate talent

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

You cannot escape the responsibility of tomorrow by evading it today

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.

Mathematics Is not a spectator sport. The only way to learn mathematics is to do mathematics.

Mistakes have the power to turn you into something better than you were before.

Procrastination makes easy things hard and hard things harder.

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

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

Twenty years from now you will be more disappointed by the things you didn’t do than the things you did do

It always seems impossible until it's done.

Tough times never last, but tough people do.