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.
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.
Ruin has taught me to ruminate,
That Time will come and take my love away.
This thought is as a death, which cannot choose
But weep to have that which it fears to lose.