FF silence the voice of authority by pandering to vested interests
Whereas the bold Jupiter, ruler of the heavens, was inclined to hurl down bolts of thunder and lightning to frighten the rest of us, Janus was the god of doors and beginnings. (January, the first month of our year, is named after him.) All doors and gates were sacred to Janus, and his statue was always kept at the entry to a building, so that his blessing could be sought by everyone coming in and out.
By all accounts a decent fellow, Janus had one slight peculiarity (for a god, that is). He had two heads, the better to be able to look in both directions at the same time. His heads could look left and right. They could also look forward to the future and back to the past. As time went by, it came to be believed, rather unfairly where poor old Janus was concerned, that one head could argue one side of a case and the other the completely opposite one (a bit like a clever lawyer, though most of them have only one head). To this day, because of his two heads, Janus is remembered as a master of deceit.