Restraint never ruins one's health. What ruins it,is not restraint but outward suppression. A really self-restrained person grows every day from strength to strength and from peace to more peace. The very first step in self-restraint is the restraint of thoughts.
The gods are strange. It is not our vices only they make instruments to scourge us. They bring us to ruin through what in us is good, gentle, humane, loving.
Theologians consider that it was the sin of pride, the sinful thought conceived in an instant: non serviam: I will not serve. That instant was his [Lucifer's] ruin.