We're only relatively honest. So don't tempt us!
Lots of great material at the link, various studies and so forth. Also this joke:
There's a joke about a man who loses his bike outside his synagogue and goes to his rabbi for advice. "Next week come to services, sit in the front row," the rabbi tells the man, "and when we recite the Ten Commandments, turn around and look at the people behind you. When we get to 'Thou shalt not steal,' see who can't look you in the eyes. That's your guy." After the next service, the rabbi is curious to learn whether his advice panned out. "So, did it work?" he asks the man. "Like a charm," the man answers. "The moment we got to 'Thou shalt not commit adultery,' I remembered where I left my bike."