Justin Martyr — Second Apology 6
We do not say that what happens to people is done or suffered by fate. Each person succeeds or sins by deliberate choice (προαίρεσις), and wicked demons also work against the serious — as they did against Socrates and his like — while a Sardanapalus or an Epicurus seems to prosper.
The Stoics missed this and declared that everything happens by fate’s necessity. But God made both the race of angels and of human beings self-determining (αὐτεξούσιον) from the beginning; therefore they justly receive punishment in eternal fire for whatever they do wrong.
It is the nature of everything that has come to be to be capable of vice and virtue. Nothing of theirs would be praiseworthy if it did not also have the power to turn either way.