Complete the opening line of "Twelfth Night": "If music be the food of love,..."

Complete the expression: "In for a penny, in for a ___". Complete the title of John le Carré's novel "Tinker, Tailor, ___". Complete the line from a parable in Matthew: "Many are called..." Complete the line from Luke 11:23: "He that is not with me is..." Complete the proverb: "Living well is the best ___". Complete the theater saying: "There are no small parts..." Complete the title of Dean Ornish's 1993 bestseller "Eat More, ___". Complete the proverb: "Every dog has..."