Call of Cthulhu 6th ed. Sanity Question

[Angry Monk]

I'm just dipping my toes into CoC, and I had a question about Sanity. I'm a little confused about the relationship between Cthulhu Mythos and starting Sanity Points. When I lose Sanity Points do I start deducting from my starting sanity points or from 99? My guess is starting sanity but reading the rules has me confused. I know Cthulhu Mythos increases (which also decreases my Sanity), but my Sanity can decrease without my CM increasing depending on the cause of my sanity loss.

Just wanted to make sure I understood.

[Dizzy]

AM, welcome to CoC! One of my absolute favorite RPGs. I haven't ran it myself in a few years, but from the best of my memory, you count down sanity points from your max, not from 99. Don't get attached to characters, they will certainly go insane after awhile.

[Angry Monk]

Thanks, Dizzy. I've  never played CoC before so I'm sort of nervous. It reads like a very logical game system. I was just trying understand the insanity. Yes, I've told my players not to think like hack & slash players but we'll see what they think.