So much today is asserted as fact in the real of science, which is nothing but theory and hypothesis. This is one of the great troubles it seems to me today. I am not only skeptical about it. I ridicule it for this reason that I know in my medical training we were told, you see, that 100 years ago they regarded the thyroid gland as a vestigial remains. No function. What we know now, that you can't live without it. They are still saying that about the appendix. They said this about soo much. This is the arrogance of modern man. Because his knowledge is limited, he makes these wild assertions that can't be proven. All I am prepared to agree with is this: Men today is behaving like an animal. The question is why?

Dr. Martyn Lloyd Jones in a Dec 1970 interview