God asked Ananias to do something that Ananias was not comfortable doing. It’s easy to obey God when we feel like it, but that’s not faith. You will never know that God is trustworthy if you don’t take the risk of following him.
Acts 9:10-19 New International Version (NIV)
10 In Damascus there was a disciple named Ananias. The Lord called to him in a vision, “Ananias!”
“Yes, Lord,” he answered.
11 The Lord told him, “Go to the house of Judas on Straight Street and ask for a man from Tarsus named Saul, for he is praying. 12 In a vision he has seen a man named Ananias come and place his hands on him to restore his sight.”
13 “Lord,” Ananias answered, “I have heard many reports about this man and all the harm he has done to your holy people in Jerusalem. 14 And he has come here with authority from the chief priests to arrest all who call on your name.”
15 But the Lord said to Ananias, “Go! This man is my chosen instrument to proclaim my name to the Gentiles and their kings and to the people of Israel. 16 I will show him how much he must suffer for my name.”
17 Then Ananias went to the house and entered it. Placing his hands on Saul, he said, “Brother Saul, the Lord—Jesus, who appeared to you on the road as you were coming here—has sent me so that you may see again and be filled with the Holy Spirit.” 18 Immediately, something like scales fell from Saul’s eyes, and he could see again. He got up and was baptized, 19 and after taking some food, he regained his strength.