Ss. Cornelius & Cyprian: "you should know how to behave"

... in the household of God, which is the church of the living God, the pillar and foundation of truth. Undeniably great is the mystery of devotion, Who ⁷ was manifested in the flesh, vindicated in the spirit, seen by angels, proclaimed to the Gentiles, believed in throughout the world, taken up in glory.

-- 1 Tm 3:14-16

God is infinitely good and all his works are good. Yet no one can escape the experience of suffering or the evils in nature which seem to be linked to the limitations proper to creatures: and above all to the question of moral evil. Where does evil come from? "I sought whence evil comes and there was no solution", said St. Augustine, and his own painful quest would only be resolved by his conversion to the living God. For "the mystery of lawlessness" is clarified only in the light of the "mystery of our religion". The revelation of divine love in Christ manifested at the same time the extent of evil and the superabundance of grace. We must therefore approach the question of the origin of evil by fixing the eyes of our faith on him who alone is its conqueror.

-- CCC 385