“The strength of the team is the team” discussions about meaningful expectations and divisions of labor are all particularly useful at various times. “Remaining singularly focused” is often the only way you can accomplish some specific task, and “wanting volunteers, not hostages” is important for many relationships, professional and personal.
My favorite quotes have to be about uncertainty and fear. If you blink, cut your eyelids off.” and “taking the calculated risks associated with secure victory” are great. “Living in our hopes not in our fears” go through my head a lot.