Saint Peter Claver: "love builds up"

If anyone supposes he knows something,
he does not yet know as he ought to know.
But if one loves God, one is known by him.

-- 1 Cor 8:1b-7, 11-13

The New Law is called a law of love because it makes us act out of the love infused by the Holy Spirit, rather than from fear; a law of grace, because it confers the strength of grace to act, by means of faith and the sacraments; a law of freedom, because it sets us free from the ritual and juridical observances of the Old Law, inclines us to act spontaneously by the prompting of charity and, finally, lets us pass from the condition of a servant who "does not know what his master is doing" to that of a friend of Christ - "For all that I have heard from my Father I have made known to you" - or even to the status of son and heir.

-- CCC 1972

St. Matthew the Apostle: "And he gave some as Apostles, as evangelists"

...to equip the holy ones for the work of ministry, for building up the Body of Christ, until we all attain to the unity of faith and knowledge of the Son of God, to mature manhood, to the extent of the full stature of Christ.

-- Eph 4:1-7, 11-13

What Christ entrusted to the apostles, they in turn handed on by their preaching and writing, under the inspiration of the Holy Spirit, to all generations, until Christ returns in glory.

-- CCC 96

Art: Caravaggio, St. Matthew and the Angel. 1603. Oil on canvas. San Luigi dei Francesi, Rome, Italy.