A few of my favorites:
“There are only 3 real sports: bull-fighting, car racing and mountain climbing. All the others are mere games.”— Hemingway.
“Climbing may be hard, but it’s easier than growing up.” — Ed Sklar.
“You can grunt and heave, sweat and strain, wear yourself out, and unless you simply forget about it and step up, you won’t even get off the ground.” — Mike Borghoff.