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

The easiest person to deceive is yourself.

Time is your friend, impulse is your enemy.

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

It doesn’t matter where you start, it matters how you end

There is great wisdom in being able to realise that you don’t understand something before it goes too far.

The journey of a thousand miles begins with one step. 

I think, therefore I am.

Practice makes comfort. Expand your experiences regularly so every stretch won't feel like your first.

The master has failed more times than the beginner has even tried

There is no elevator to success, you have to take the stairs.

Pure mathematics is in its way, the poetry of logical ideas.

Dreams don't work unless you do.

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

Good mathematics is not about how many answers you know... It is about how you behave when you don't know.