Today, in St. Luke's feast —the Evangelist of Christ's gentleness and meekness— the Church proclaims this Gospel where the main traits Christ's apostles must have, are established.
In the first place, the apostles have been directly called by the Lord, and mandated by him, to go out on his behalf: it is Jesus himself who calls whom He wants to entrust with a concrete mission! «The Lord appointed seventy-two other disciples and sent them two by two ahead of him to every town and place, where He himself was to go» (Lk 10:1).
And, because the apostle has been delegated by the Lord, he is, on top of everything, entirely dependent upon him. «Set off without purse or bag or sandals; and do not stop at the homes of those you know» (Lk 10:4). Jesus' prohibition to his disciples mostly implies they must completely rely on their Lord Jesus, abandoning themselves to him, up to the point of leaving in his hands whatever is most essential for their lives: the Lord, who takes care of the iris flowers in the prairie and feeds the little birds, wants his disciples to look, in the first place, for the Kingdom of Heaven and not, instead, «to seek what you are to eat and what you are to drink, and not worry anymore. All the nations of the world seek for these things, and your Father knows that you need them» (Lk 12:29-30).
The apostles are still who prepare the path for their Lord, by announcing his peace and healing the sick, thus, evidencing the coming of his Kingdom. The apostle's task is, therefore, of paramount importance in and for the life of the Church, because the future welcome of the Master amongst men will depend upon it.
The best testimony of the feast of an Evangelist —who has narrated the announcement of the Good News—, is to make us think of the apostolic and evangelizing dimension of our Christian life.