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

The wise person knows that no answer is also an answer

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

Go as far as you can see, when you get there, you’ll be able to see further

Time is your friend, impulse is your enemy.

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

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

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.

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

Fall down seven times, stand up eight.

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

1.00³⁶⁵=1 and 1.01³⁶⁵=37.7. Doing nothing at all versus small steps at a time. 

Work on your weaknesses until they are your strengths and work on your strengths until they are second nature.

Tough times never last, but tough people do.