Akrasia (G192) is the opposite of enkrateia (self-control, G1466). The word means literally 'without power over oneself.' Jesus uses it in his list of things that defile, warning against hypocrites who are inwardly full of akrasia (Matthew 23:25). Paul mentions it in 1 Corinthians 7:5 as a vulnerability to sexual immorality if couples abstain too long.
Akrasia is the Achilles' heel of the moral life. Aristotle devoted significant attention to it — the person who knows what is right but cannot control themselves to do it. Scripture agrees: the fallen nature lacks self-restraint. The Spirit's fruit includes enkrateia (self-control, Galatians 5:23) as the divine solution. Self-control is a gift of the Spirit, not merely a human virtue to cultivate.