Don’t be afraid to work hard and find out how good you can really be.

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

Fall down seven times, stand up eight.

The journey of a thousand miles begins with one step.

You can have results or excuses, not both

Do what you have always done and you will always be what you have always been

The wise person knows that no answer is also an answer

Nothing is impossible if you want it badly enough. Impossible = I'm possible.

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

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

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

I had no time is no excuse. 1 hour is 4% of your day and 1 minute is 0.34 % of your day.

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

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

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.