Jesus is impressed and amazed by the faith this Centurion, a Gentile, has in Him.
Likewise, we need to trust in the Lord and have faith in the Word of God ... It's Truth and power.
The centurion answered and said, Lord, I am not worthy that you should come under my roof: but speak the word only, and my servant shall be healed
When Jesus heard it, he marveled, and said to them that followed, Truly I say to you, I have not found so great faith, no, not in Israel."