How many things might exist but we don't see them? Have you ever walked in total darkness and had to feel with your arms and legs if something was in front of you so you didn't trip? Of course with a little light, we can begin to see objects. As humans, we often think pretty highly of ourselves. But the fact is, throughout history humans have walked around naïve to many things in existence that were finally discovered through the right lens and with light.
Let's not have the mindset that we must see to believe. Let's use common sense and logic to deal with everyday issues which arise, but also to stay open-minded about possibilities. It sure makes life more enjoyable.