There are no bad mistakes in maths, only discoveries.

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

Yesterday is history, tomorrow is a mystery, but today is a gift—that's why it's called 'the present

I think, therefore I am.

Success can never happen without the journey (struggle).

Don’t confuse your path with your destination. Just because its stormy now doesn’t mean you are headed for failure.

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

If you can understand just one thing thoroughly, then you will understand everything.

Work like you don't need the money, dance like nobody's watching and love like you've never been hurt. 

Don’t compare yourself to others. Compare yourself to the person you were yesterday.

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

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

Failure is not the opposite of success, it is part of the success.

The greatest glory in loving lies not in never falling, but in rising every time we fall.

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