Everything that the Lord does has relevance for our salvation. The very act of casting nets and gathering in speaks of the role of the apostle. Our Lord is also sanctifying the work of the disciples, and, on a practical level, He is choosing men who were physically tough, used to dealing with sudden storms on the Sea of Galilee.
Whatever our line of work, whatever our skills we have, whatever talents we have, we can recognize them, first of all, as gifts of God. These are, at the same time, our own works and our own gifts and talents.
When we see Jesus choosing the humble Galilean fishermen, and the despised tax collector Matthew, we can be encouraged that all of us have a part to play in building up the kingdom of God. God loves everything God has created, and holds it lovingly in being. God also gives the great privilege of sharing in God’s own redeeming power.