Today is the feast of Saint Ambrose. We might not know much about Saint Ambrose, but he is a very important saint for us. He was one of the first four doctors of the Church. Saint Ambrose was a politician, who unlike today, was so well-loved he was named bishop by pubic acclaim. Perhaps most importantly, Saint Ambrose fought ceaselessly against a heresy that denied the divinity of Christ in a way which made Christ equal with the Father and the Spirit.
During Advent this matters, because it is not just because Jesus was a nice person worthy to imitate that we celebrate. Rather, we celebrate the Second Person of the Blessed Trinity who takes on flesh to become fully human. Three persons in one God. So that the incarnation is not just one birth among many, it is THE birth that is connected to our salvation. We seek the promises of God because God has become one of us, and has become savior to a people that do not deserve or earn salvation.