A filter is a device that removes unwanted and harmful stuff from whatever passes through it. If you want to drink clean water, you run it through a filter attached to your faucet. And in theory the device will filter out all the harmful stuff and leave you with clean, and great tasting water. The water has been changed.
Filtered water is often a very good thing.
Our lives are seen and lived through the lens of our experiences and what we’ve learned. These become our perceptions, which in turn are our reality. Whether they are based in fact or not is irrelevant, because we don’t know our truth at that time.
When I was in therapy, my therapist would say to me, “Shelly your filter is off kilter.” Thoughts or feelings would go in and they would filter through my past experiences of coping, how others portrayed me, my perceptions, and my reality. At that time, I was in a relationship that was emotionally abusive. My ex-husband had narcissistic tendencies. My life with him left me in a tangled, blubbering mess.