1. You don't, because you don't need to. People get overly obsessed with sigils and overestimate them. The only reason Gods have sigils is to show some secret knowledge hidden within the sigil. That's actually the only reason. You pretty much can communicate telepathically with a God without even knowing anything about sigils at all.
2. He didn't say anything, but obviously it's been said many times that we're law abiding. Not doing anything illegal. Again people get too obsessed with "what Satan says". Satan does want us to use our common sense and perception of reality, he doesn't really force us to obey any external commands. It isn't christinsanity here. Satan does give us sometimes advice, but he does also give us a choice whether to apply his advice or not. His advice is true and for our own good in all cases.