You can have results or excuses, not both

Time is your friend, impulse is your enemy.

We learn more from failure than we do from success.

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. 

There are no bad mistakes in maths, only discoveries.

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

Hard work - a two way street where you get exactly what you put in.

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

Tough times never last, but tough people do.

Work ethic is important, because, unlike intelligence, athleticism, or charisma, or any natural attribute, it’s a choice.

Success can never happen without the journey (struggle).

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

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

Run in the morning before your body figures out what you're doing

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