Bread is the staff of life.
Prov. Food is necessary for people to survive. Miranda likes to give money to charities that feed people. "Other services are important," she reasons, "but bread is the staff of life." Jill: Want to go to lunch with us, Bob? Bob: No. I must work on my novel while inspiration lasts. Jill: Don't forget to eat. Bread is the staff of life, you know.