Jesus asks whether God will avenge his chosen ones, "and yet he exercises patience with them?" (18:7), and says, "he will avenge them quickly" (18:8). How do those fit together?

Here is what Jesus says, in its order. "Won’t God avenge his chosen ones who are crying out to him day and night, and yet he exercises patience with them?" (18:7) (tap patience). "I tell you that he will avenge them quickly. Nevertheless, when the Son of Man comes, will he find faith on the earth?" (18:8). Luke tells of no explanation of how the patience and the quickness fit, and Jesus's words end with a question that Luke gives no answer to. Luke gives the reason for the parable: "that they must always pray and not give up" (18:1). Christians read these verses in more than one way; the chapter doesn't settle it, and these notes don't either. They don't say who "his chosen ones" are, or when the Son of Man comes.