An early Christian thinker, believing things were created good but free will enabled evil.
Humans use free will to choose evil.
Later in life, he believed we can't understand God's mind and what may appear evil may not be at all (Human's can't judge God)
Suggested three reasons for evil.
Helps humans to appreciate good.
In his document on faith, hope and love called The Enchiridion, the definition of evil is ‘privation of good.’ (3:11) meaning evil = absence of Good, Through poor choice, we cause privation of Good.