The Creator will not appear to have been unjust when, according to the above principles, he placed everyone in a position proportionate to his merit;… - Origen

The soul of while in the body, can admit different energies, that is, controlling influences, of spirits either good or bad. Now the bad spirits work in two ways; that is, they either take whole and entire possession of the mind, so that they allow those in their power neither to understand nor to think, as is the case, for example, with those who are popularly called “possessed,” whom we see to be demented and insane, such as the men who are related in the Gospel to have been healed by the Savior; or they deprave the soul, while it still thinks and understands, through harmful suggestion by means of different kinds of thoughts and evil inducements

All these, down to the very least, God supervises by the power of his wisdom and distinguishes by the controlling hand of his judgment; and thus he has arranged the universe on the principle of a most impartial retribution, according as each one deserves for his merit to be assisted or cared for. Herein is displayed in its completeness the principle of impartiality, when the inequality of circumstances preserves an equality of reward for merit. But the grounds of merit in each individual are known with truth and clearness only to God, together with his only-begotten Word and Wisdom and his Holy Spirit.

As for the apostolic epistles, what person who is skilled in literary interpretation would think them to be plain and easily understood, when even in them there are thousands of passages that provide, as it through a window, a narrow opening leading to multitudes of the deepest thoughts?