There's an old saying, Now you must have heard that expression before. It usually pre faces something we want someone to see as an undeniable truth. When you say there's an old saying, you activate a script in your prospects mind, if anybody no matter where, at whatever time says there's an old saying, our mind thinks it's probably true because it's an old saying, might sound weird. However, that's one of the ways your subconscious makes quick decisions. Your mind has to deal with lots of important stuff. So it sets up shortcuts to make the thought process easier.
One of those shortcuts is when it hears there's an old saying, your mind simply agrees and moves on to other more important stuff. Give me a few examples. There's an old saying that it never rains, but it pours. There's an old saying that practice makes perfect. There's an old saying that clothes make the man The old saying is going to work for you.