The man who brought strength and order to the UK in what some consider the darkest times in that regions history certainly was speaking on something quite true to form in the quote above. World War 2 was a bleak time to be across the channel from the Nazi war machines advanced rocketry, hatred and engineering finesse. Even through adversity Winston Churchill managed to keep all under his wing striving towards victory employing the idea and wisdom sampled above.
We as humans are set up to create better conditions around us on a genetic level it seems. The term "Optimization Algorithm" used in AI engineering is what personally resonates with me. Don't be afraid to fail, for it's simply a means of self education/ Failure is only truly tasted when an individual gives up and stops striving towards a goal set.