"Nothing seems to me to be rarer today than genuine hypocrisy."

From a list of 35 aphorisms about lying.

But none of the aphorisms on the list is the aphorism I am looking for. You know the feeling that there is an aphorism that's already out there for something you're trying to say in aphorism form. You can say it briefly, but not in the words that must be in the aphorism.

Here's as close as I can get to saying what seems to me to be a rough paraphrase for a reasonably well-known aphorism: He who lies about small things will lie about big things. Or: Little lies foretell big lies.

What I'm looking for is the "Where there's smoke, there's fire" of lying.