…for, behold, he prayeth…Brother Saul, the Lord, even Jesus, that appeared unto thee in the way as thou camest, hath sent me… – Acts 9:11, 17

Poor Ananias was afraid to go to Saul; he thought it was very much like stepping into a lion’s den. “If I go to his house,” he thought, “the moment he sees me, he will take me to Jerusalem at once, for I am one of Christ’s disciples; I dare not go.” God says, “Behold, he prayeth.” “Well,” says Ananias, “that is enough for me. If he is a praying man, he will not hurt me; if he is a man of real devotion, I am safe.” Be sure you may always trust a praying man. I do not know how it is, but even ungodly men always pay a reverence to a sincere Christian. A master likes to have a praying servant after all; if he does not regard religion himself, he likes to have a pious servant, and he will trust him rather than any other. True, there are some of your professedly praying people that have not a bit of prayer in them. But whenever you find a really praying man, trust him with untold gold; for if he really prays, you need not be afraid of him. He who communes with God in secret, may be trusted in public. I always feel safe with a man who is a visitor at the mercy-seat… This, then, was an argument to Ananias, that he might go with safety to Saul’s house. Secret prayer is one of the best tests of sincere religion. If Jesus had said to Ananias, “Behold, he preacheth,” Ananias would have said, “that he may do, and yet be a deceiver.” If He had said, “He has gone to a meeting of the church,” Ananias would have said, “He may enter there as a wolf in sheep’s clothing.” But when He said, “Behold, he prays,” that was argument enough. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0016.cfm