Dualism isn’t taught in the bible, we need not to think or talk in binary (2) opposites. It is mainly used to protect an ideology & to discourage critical thinking in indoctrination. A good example of this, is when George Bush after 9/11 declared publicly “Either you are with us or against us” there was no room for neutrality in the war against terrorism. That phrase was to silence the critics that opposed his ideology of war.