“Nothing is ever gained in doing what's wrong”

This quote means that There is no benefit from doing what’s wrong. You don’t gain anything from it. For example, you go to a party and there are alcoholic drinks. You drink there and get really drunk. What happens well the consequences may vary negative things could be possible to happen to you. You sometimes don't even feel happy with what you're doing so the bad takes over advantage so you always have to chose what's good instead of bad.