A lot of us here are probably a bit gutted that we got things so wrong, with believing all that witness stuff.It may have humbled us somewhat and made us think more deeply about things before jumping in the deepend.
But you are not alone in being wrong.In fact having wrong beliefs and ideas on the world and life etc is an entierly normal feature of humanity.Through out history most people have lived their lives in complete or partial ignorance as to the workings of this world, but due to the brains nead to have a structure and pattern to think by, have believed wrong things.The Earth is flat, mice grow from rags, a shock can to a mother causes deformities in babies, amongst countless others.
Even today in our "enligthened "world there is no concensus among all humanity regarding what is right.There are millions of Catholics, hindus and people of other relgions.There are many theories as to say the workings of the mind or the origin of life.No one knows the answer to every thing.All we can do is try to learn as much as we can , and to be balanced and reasonable about what we believe , chosing maybe to not be so dogmatic on issues that we cant really know the answer to.
All humans believe wrong thing , sometimes in quite a major way, but we have had the oppurtunity to learn that no matter how strongly we believe something to be true, it may not be.