Jesus starts his public ministry after having been baptized by John the Baptist. And in today’s gospel, John the Baptist presents the same Jesus to his disciples as the Lamb of God who takes away the sins of the world. Thus John became a channel between Jesus and his disciples. He did not keep them for himself; he rather sent them to Jesus.
When they met him, they were so fascinated that they wanted to know where he was staying. And Jesus told them: “Come and see.” So they went and stayed with him the rest of that day. They enjoyed their encounter with the Lamb of God so much that Andrew  felt the need to share it with his brother Simon: “Early next morning, Andrew met his brother and told him, we have found the Messiah, and he took Simon to Jesus.”
Similarly, in the first reading taken from 1st Samuel, Eli helps Samuel to discern his vocation: “Go and lie down, and if someone calls, say:" Speak Lord, your servant is listening.” Thus Eli drew him to the Lord.
Like John the Baptist, Andrew and Eli, all the baptized christians are sent to draw people to Jesus, the Lamb of God. We cannot fulfill our missionary vocation as baptized, if we do not always abide with Jesus to learn from him. That is why ongoing formation and retreats are very important not only for priests and consecrated people, but for all baptized.
Our parishes should be places where our faithful enjoy staying with Jesus, in order to learn from him how to be missionary disciples: Come to me and learn from me (cf. Mt11:29). For Jesus, the Lamb of God, is the missionary par excellence, the missionary of the Father. 
How many parishes organize post-baptism formation for the faithful? How many faithful are eager to keep learning about their faith in order to be efficient missionaries? How many parishes organize retreats during Advent and Lent seasons?
Fr. Martin Ali keke Ndemsou, sx