Every great improvement has come after repeated failures. Virtually nothing comes out right the first time. Failures, repeated failures, are finger posts on the road to achievement. One fails forward toward success.

We have a lot of people revolutionizing the world because they've never had to present a working model.

The typical eye sees the ten per cent bad of an idea and overlooks the ninety per cent good.

Every great improvement has come after repeated failures. Virtually nothing comes out right the first time. Failures, repeated failures, are finger posts on the road to achievement. One fails forward toward success.

I could do nothing without my problems; they toughen my mind. In fact, I tell my assistants not to bring me their successes for they weaken me, but rather to bring me their problems, for they strengthen me.

We work day after day, not to finish things; but to make the future better ... because we will spend the rest of our lives there.

It is not a disgrace to fail. Failing is one of the greatest arts in the world.