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

I think, therefore I am.

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

Time is your friend, impulse is your enemy.

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

Don't fear failure, fear being in the same exact same place next year as you are now.

Don’t practice until you get it right, practice until you can’t get it wrong.

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.

Don't expect to be good at maths or understand things straight away. Be patient and persistent. Rome wasn't built in a day, but they worked on it every single day. 

The greatest enemy to human potential is your comfort zone

Tough times never last, but tough people do.

We learn more from failure than we do from success.

The boxer is not afraid of being knocked down, he is afraid of not being able to get up again.

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