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

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

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

The journey of a thousand miles begins with one step.

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

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

Time is your friend, impulse is your enemy.

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

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

Shoot for the moon and even if you miss you’ll land among the stars/

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

If you want to succeed, double your failure rate.

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

It always seems impossible until it's done.

If you really want something you’ll find a way. If you don’t you’ll find an excuse.