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

A hero is no braver than an ordinary man, but he is braver five minutes longer.

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

You can hire a tutor but you can't hire someone to practice for you.

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

Dreams don't work unless you do.

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

Tough times never last, but tough people do.

I think, therefore I am.

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.

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

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

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

It doesn’t matter where you start, it matters how you end

You're not in competition with anyone but yourself. Outdo your past, not other people.