With just One Line

What could you say with just one line if you were ever put on the spot? What would you say in just one line if you were ever abruptly caught? What should you say in just one line to ensure a lesson be taught? What if just one line was all you got? Would you take your time to make sure just one line would work? What if you had just one line to say to the one person who were walking away? With just one line you could have changed their mind, what would you have said? What lines are now floating around your head? Tell me just one line that I will remember for all time and maybe I'll give you mine.