Need help thinking or saying.?

okay, so I just read a book & these to people had a saying that I really liked. it was "The center will hold." bc of poem by Yeats. in the poem he says "Things fall apart; the center cannot hold" anyway I got my best friend a gift & I want to engrave something on it. I need a short saying to write, but can't think of any. does anyone know any like quotes or poems. they can be negative or positive bc I'll try to flip it around to something positive like the characters in the book did.

thanks.