Never underestimate the importance of small steps. small steps = big changes. 

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

Mathematics Is not a spectator sport. The only way to learn mathematics is to do mathematics.

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

Success can never happen without the journey (struggle).

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.

The greatest enemy to human potential is your comfort zone

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

If you fail, next time fail better.

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

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.

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

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

It always seems impossible until it's done.