Just because I am retired doesn't mean I don't know medicine. Besides, what does faith have to do with the Greek meaning of heresy? That is a linguistic topic and if you know any biblical Greek you wouldn't be embarrassing yourself this way.
1Cr 2:12 Now we have received, not the spirit of the world, but the spirit which is of God; that we might know the things that are freely given to us of God. 13 Which things also we speak, not in the words which man's wisdom teacheth, but which the Holy Ghost teacheth; comparing spiritual things with spiritual.
14 But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know [them], because they are spiritually discerned.