34 The eunuch asked Philip, “Tell me, please, who is the prophet talking about, himself or someone else?” 35 Then Philip began with that very passage of Scripture and told him the good news about Jesus. 36 As they travelled along the road, they came to some water and the eunuch said, “Look, here is water. What can stand in the way of my being baptized?”[37Some manuscripts include here Philip said, “If you believe with all your heart, you may.” The eunuch answered, “I believe that Jesus Christ is the Son of God.”]
Certain great men have misused this passage when they want to prove that faith is not confirmed by baptism. They argued that the eunuch was told to bring perfect faith to baptism, so nothing could be added. But Scripture often uses the phrase “with all your heart” to mean “sincerely” and there may be weak faith in someone who is free from hypocrisy. Philip had baptized the Samaritans before, and yet he knew that they were as yet far from perfect. Therefore, to believe with all our heart is to have living roots of belief in our wanting it to increase every day.