"My father taught me to finish anything I started. And I think that carries throughout your adult life. Most people's personalities and moralities are formed when they are rather young, and that characteristic will carry out throughout their lifetime. We were disciplined as kids, quite severely, if you didn't finish your jobs, and I think that's what brought about a desire to finish what I start and do the best job you could. And that's probably the reason that characteristic has carried throughout my life."
January 1, 1970
https://en.wikiquote.org/wiki/Chuck_Yeager