When Isaiah prophesied of the Father’s incarnation, the Father called Himself, “Prince of Peace”. [peace: ii. with God, especially in covenant relationship]

Isaiah 9:6-7 For unto us a child is born, unto us a son is given: and the government shall be upon his shoulder: and his name shall be called Wonderful, Counsellor, The mighty God, The everlasting Father, The Prince of Peace.

The peace that comes from the Father was also prophesied by Zacharias.

Luke 1:77-79 To give knowledge of salvation unto his people by the remission of their sins, through the tender mercy of our God; whereby the dayspring from on high hath visited us, to give light to them that sit in darkness and in the shadow of death, to guide our feet into the way of peace.

Jesus guides our feet into the way of peace by the preaching of the gospel and by our obedience to the gospel. The gospel is the death, burial, and resurrection of Jesus. We obey the gospel by crucifying our sinful desires by repentance, by burial with Christ by immersion in water baptism with Jesus’ name called upon us for the remission of our sins, and by receiving the Spirit of Jesus, speaking in tongues as His Spirit gives us the utterance (1Corinthians 15:1-4, Romans 6, Acts 2:38, Acts 2:4).

When we have obeyed the gospel, our feet are shod with the preparation of the gospel of peace. We have peace with God by the gospel. While sin separated us from God, He redeemed us back to Himself, making peace between us.

The peace the Father brought was announced by angels at His birth.

Luke 2:11-14 For unto you is born this day in the city of David a Saviour, which is Christ the Lord. And this shall be a sign unto you; ye shall find the babe wrapped in swaddling clothes, lying in a manger. And suddenly there was with the angel a multitude of the heavenly host praising God, and saying, Glory to God in the highest, and on earth peace, good will toward men.

Colossians 1:19-23 ¶For it pleased the Father that in him should all fulness dwell; and, having made peace through the blood of his cross, by him to reconcile all things unto himself; by him, I say, whether they be things in earth, or things in heaven. And you, that were sometime alienated and enemies in your mind by wicked works, yet now hath he reconciled in the body of his flesh through death, to present you holy and unblameable and unreproveable in his sight: if ye continue in the faith grounded and settled, and be not moved away from the hope of the gospel, which ye have heard, and which was preached to every creature which is under heaven; whereof I Paul am made a minister…

The gospel that Paul preached is found in Acts 2:38-39:

Then Peter said unto them, Repent, and be baptized every one of you in the name of Jesus Christ for the remission of sins, and ye shall receive the gift of the Holy Ghost. For the promise is unto you, and to your children, and to all that are afar off, even as many as the Lord our God shall call.