Luke gives here the definition of the plenitude of a Christian life. Indeed, if the essence of this life is union with God, acceptance of His presence and action in each of our days, then where and how He left us this presence and action? You will say, everywhere? And it's true, but such His presence, is "diffuse”, impersonal, it does not imply having personal relationships with Him. Then you will ask, in Jesus Christ? Yes, isn't said that He is with us "always, even unto the end of the world"? It is God's Word which came in flesh, and He stays with us in God's Word, in the Bible. Luke calls this "the Apostles’ doctrine", because it is in particular the apostolic perception of the Old Testament and the apostolic testimony of Christ that make our Bible. Where do we meet with Christ again? Of course, in the prayer. In a prayer addressed to Him, and in a prayer that we share with the Son to the Father. Also there is a special presence of the Christ in His Body and Blood - in the Eucharistic meal, the "breaking of bread". And finally, let's remember these words of Jesus: "Inasmuch as ye have done it unto one of the least of these my brethren, ye have done it unto me". Thus, there is His presence in every person we meet; there is specially His action in those who "accepted the Holy Ghost, having believed". And that is why "dialogue", fraternal love, mutual assistance are also a meeting with Christ and His acceptance in our life. Let's pay attention to all these "channels of communication", without trying "to advance" one of them at the expense of another, let's try to live with "and -and ", and not with " or-or ".