O marvellous exchange! Man's Creator has become man, born of the Virgin. We have been made sharers in the divinity of Christ who humbled himself to share our humanity. 208
Catechism number 527
Jesus' circumcision, on the eighth day after his birth,209 is the sign of his incorporation into Abraham's descendants, into the people of the covenant. It is the sign of his submission to the Law210 and his deputation to Israel's worship, in which he will participate throughout his life. This sign prefigures that "circumcision of Christ" which is Baptism.211