I agree, you can only varify things for yourself to yourself, all else is faith. However once lived through and it is experienced then bedrock! You can't deny what you experience because to do so is stupidity. A good friend of mine once said, "it takes willingness to accept the truth after we have discovered it".
There is also what I like to call reasonable evidence. For example, if some idiot decided to jump off a building ten stories high and died, there is enough evidence to support that if you jump off of a building that high you will die. I'd rather not try to experience this but go with the evidence. This is called being wise. I never stated that what I experience must be real to you in order for it to be real to me, I stated all experiences are real.