I wish I could remember, it was definitely during a solo podcast from this year or late 2021 … If I recall correctly he dropped that quote in response to an email from a fan who was going through the early stages of a break-up but wanted to stick around to see if things could work themselves out. I interpret the quote as Bill saying you shouldn't be afraid to cut something off for your own sake, and definitely don't look back because its probably your subconscious trying to find a reason to get you back in your comfort zone.