Don't be scared of the ‘what ifs,’ because the truth is, the only failure is not trying. That's the only way you can fail. Trying and having it not work out isn't failure.

It is not the critic who counts; not the man who points out how the strong man stumbles or where the doer of deeds could have done them better. The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood; who strives valiantly; who errs, and comes short again and again, because there is no effort without error and shortcoming; but who does actually strive to do the deeds; who knows the great enthusiasms, the great devotions; who spends himself in a worthy cause; who at the best knows in the end the triumph of high achievement, and who at the worst, if he fails, at least fails while daring greatly, so that his place shall never be with those cold and timid souls who know neither victory nor defeat.

The Godfather was a very unappreciated movie when we were making it. They were very unhappy with it. They didn't like the cast. They didn't like the way I was shooting it. I was always on the verge of getting fired. So it was an extremely nightmarish experience. I had two little kids, and the third one was born during that. We lived in a little apartment, and I was basically frightened that they didn't like it. They had as much as said that, so when it was all over I wasn't at all confident that it was going to be successful, and that I'd ever get another job.

So we had to take this special exam and I flunked it. Erv Upton passed it, and I was scared. I figured if I failed it, I wouldn’t have any chance of getting in. So I failed it beautifully. ... And so it was the first year of this general college, which gave an Associate of Arts degree after two years, and that was expected to be a terminal course. It turned out it wasn’t.

But whenever you do find something — maybe it’s not as passionate for you as dog mushing has been for me — but the fact that you have any interest, that is what you should go with.

One of my favorite lessons is best summed up in the words of an old Athabascan Indian who told me, “There are many hard things in life, but there is only one sad thing, and that is giving up.”