To me that shows us how outside forces influence our thoughts. Did I want to buy this garbage bag because it's a good value, has a good design, or because I've heard "DONT GET MAD, GET GLAD!!" 1000 times? Every thought we have is affected by our experiences, and many experiences can be controlled - they call these advertisements.
I find this topic fascinating. I suffer from depression, and my thoughts during a major depressive episode can be the stark opposite from when I feel well (Let's say it's about suicide). How can I truly have "free will" if my decisions are so dependent on external influences?