I always was that person who was hard on myself and challenged myself no matter what I was doing, whether it was passing third grade or playing basketball.

He who would learn to fly one day must first learn to stand and walk and run and climb and dance; one cannot fly into flying.

When you see a good person, think of becoming like her/him. When you see someone not so good, reflect on your own weak points.

Man is a rope, tied between beast and overman - a rope over an abyss. What is great in man is that he is a bridge and not an end: what can be loved in man is that he is an overture and a going under.

On the mountains of truth you can never climb in vain: either you will reach a point higher up today, or you will be training your powers so that you will be able to climb higher tomorrow.

The smartest people are constantly revising their understanding, reconsidering a problem they thought they'd already solved. They're open to new points of view, new information, new ideas, contradictions, and challenges to their own way of thinking.