If what you believe is contrary to the truth of God's Word, then your belief must change.  God's Word does not.  (Ref. Hebrews 13:8)

St. Augustine (354-430 A.D.) paraphrased quote

     If you believe what you like in the Gospels and reject what you don't like, it is not the Gospel you believe, but yourself.         (Contra Faustum, Book XVII)