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. 

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

Hard work beats talent when talent doesn't work hard.

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

When you make a mistake, take another chance. Only when you choose not to do so do you fail.

You can pick up a mistake and carry it as a burden,  or you can set it down as use it as a stepping stone to greatness.

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

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

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

We learn more from failure than we do from success.

The easiest person to deceive is yourself.

Be strong enough to stand alone, smart enough to know when you need help, and brave enough to ask for it.

The greatest mistake we make is living in constant fear that we will make one.

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

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