This here is an excellent example of the true ignorance of the Christian mindset.To start with, you cannot prove that Jesus ever existed (at least it has yet to be undeniably proven) nor that the things he said or did ever happened.Therefore, to consider him such an “authority” is an error.Now, let’s talk about this “authority concept” some.First off, it is incredibly frustrating to have to explain this over and over again to Christians: An Atheists sense of faith is completely different than a Christians.Lewis is right in that most, if not all, of us take it on faith that what a physicist tells us about the universe is correct.But the difference lies in a very crucial point.Science is conducted through something we sane people call the Scientific Method.This means we don’t just seem something and make a conclusion based on that alone.Tests are conducted based on hypotheses and only when there is enough demonstrable evidence are conclusions made.Even then, nothing is written in stone.Once our knowledge on things grows and we develop new ways of testing or gain some new knowledge not yet discovered those conclusions can, and will, change.It was once concluded that the Earth was flat but as well all know today that is not now the case.Furthermore, when we are told of some new conclusion we are not forced to believe such on faith.If we so choose we can run the tests and find out the answers for ourselves.is science.Now I must admit that the point, as far as it relates to history, is a little more valid.There is really no way for me to know for certain that Lincoln ever gave a speech at Gettysburg.However, I do not base any of my choices in life on this knowledge either.History is not a doctrine which I live by.I may take lessons learned from the history I’m taught and make better decisions because of it but I do not do so because they are true.I do so because I see the logic and reason within the lesson.I do not go around and kill in the name of George Washington, but people have done such things in the name of Jesus.And this only pertains to some aspects of our history.Many other historical facts are derived through the same sort of principals used in science.Evidence of arrow heads does indeed tell us when our species started to use tools.We might only be able to speculate how those tools were used but we do know they were man made through to procedure or running tests/experiments.