The father of the nuclear navy, admiral rickover is also one of the most handn leaders in american history. He not only tests every submarine before goes out into service, but he interviews every single candidate for the submarine service - including a young jimmy carter. The question that would change carter's life was this: Why didn't i always do my best? We don't always do our best, and there is usually something more that we could give. And then when we fail, it brings an increased risk of failure.