 through prayer. Luke 19.10 says, For the Son of Man is come to seek and to save that which was lost. He spoke that after he'd saved old Zacchaeus. Zacchaeus was up in the sycamore tree. When Christ passed by, he called him. That was the effectual call he couldn't resist. And the next time we see Zacchaeus, he was thanking the Lord for salvation.