How did the apostles experience the power of the name of Jesus?

First: The apostles preached the name of Jesus and performed wonders in His name. They beseeched the Father saying, “Now, Lord … by stretching Your hand to heal, and that signs and wonders may be done through the name of Your holy Servant Jesus” (Acts 4:29– 30).

Second: The name of the Lord Jesus was magnified through the apostles (see Acts 19:17).

Third: The Lord Jesus declared to His disciples and to the faithful that they should receive power when the Holy Spirit descends upon them (see Acts 1:8), adding also that they will cast out demons in His name (Mark 16:17–18).

Fourth: The name of Jesus was the treasure of the apostles, and thus St. Peter said, “Silver and gold I do not have, but what I do have I give you. In the name of Jesus Christ of Nazareth, rise up and walk” (Acts 3:6).