"Energy and persistence conquer all things"
I like how both energy and persistence were mentioned in this quote, because, you can't really achieve set goals and objectives with only one of the two. Persistence without energy is like a fast car without gas - looks great, has components needed to reach the finish line fast, but due to absence of fuel is unable to move. Same goes for energy and persistence, one needs to have both in order to reach the finish line. One may have strong persistence and ability to achieve great things, but without energy all it is going to be are just skills that are not being used to create progress, because, energy simply isn't there.