It is never too late to turn an unproductive day into a productive one.

Mistakes have the power to turn you into something better than you were before.

There are no shortcuts to any place worth going.

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

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

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

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

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

Success can never happen without the journey (struggle).

Your attitude is everything. Pick a good one.

Twenty years from now you will be more disappointed by the things you didn’t do than the things you did do

Fall down seven times, stand up eight.

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.

I think, therefore I am.