3:1 And the teaching I gave you, my brothers, was such as I was able to give, not to those who have the Spirit, but to those who are still in the flesh, even to children in Christ.
3:2 I gave you milk and not meat, because you were, then, unable to take it, and even now you are not able;
The nativity narratives in the Gospel of Luke and the Gospel of Matthew focus on quite different aspects of the event. The Gospel of Mark, considered the earliest and most historical gospel according to the doctrine of Markan priority, does not include a nativity narrative.