Epicurus' version of the problem of evil, i.e. how can a benevolent and all powerful God create a world full of pain, injustice, and evil. The paradox is stated as follows:
"God, … either wishes to take away evils, and is unable;
or He is able, and is unwilling;
or He is neither willing nor able,
or He is both willing and able.
If He is willing and is unable, He is feeble,
which is not in accordance with the character of God.
If He is able and unwilling, He is envious,
which is equally at variance with God.
If He is neither willing nor able,
He is both envious and feeble, and therefore not God.
If He is both willing and able, which alone is suitable to God,
from what source then are evils?
Or why does He not remove them?
(Source: Lactantius attributes this to Epicurus in De Ira Dei)