The wise person knows that no answer is also an answer

If you can understand just one thing thoroughly, then you will understand everything.

Shoot for the moon and even if you miss you’ll land among the stars/

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.

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

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

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

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

Everything you want is on the other side of fear

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

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

You can be shown the path, but only you can make the first step.

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

We are all maths people : step 1 - do maths and step 2 - be a person. 

Success is not final, failure is not fatal.  It is the courage to continue that counts.