There is no elevator to success, you have to take the stairs.

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

We learn more from failure than we do from success.

Whenever you find yourself doubting how far you can go, just remember how far you have come.

Knowledge is of no value unless you put it into practice.

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

Hope might be a good breakfast, but it makes a very poor dinner

I think, therefore I am.

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

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

Focus on progress, not perfection. Practise a little bit every day - little and often  Slow and steady wins the race.

You cannot escape the responsibility of tomorrow by evading it today

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

The greatest enemy to human potential is your comfort zone

Patience is when you’re supposed to get mad, but you choose to understand