Matthew was a tax collector; hence he is seated at a table with coins being counted.
Story taken from Matthew 9:9: “As Jesus went on from there, he saw a man named Matthew sitting at the tax collector’s booth. ‘Follow me,’ he told him, and Matthew got up and followed him.”
Two figures on the left are so concerned with counting the money they do not even notice Christ’s arrival; symbolically their inattention to Christ deprives them of the opportunity he offers: eternal life.
Jesuit influence on Counter-Reformation Baroque art; the sensual or physical expression of faith as expressed in Saint Ignatius’s Spiritual Exercises