One comes from my father and reflects it own enthusiasm for life: "This is a once in a lifetime experience. Pay attention and enjoy it."
The other line came from a summer camp that I attended, Androscoggin, and was often repeated by my elder brother during our school years: "The more you put into it, the more you get out of it."
I just got back from a week off when I rested and ate and did no exercise. How dull. Looking forward, I intend to train myself up so I can whip through those candidate classes. With any luck, they'll keep me in cycle past May and August and I get to train with my son until November!