Never be too certain with yourself as you are more than likely incorrect. Challenge your own thoughts and beliefs, always debating within yourself. Overtime of practicing this, and always following the evidence over emotions, you will develop a solid foundational belief system that will be able to contend against any ideology that challenges it. It is easier to become possessed by an ideology than it is to follow where the evidence leads as the evidence often times leads you to the place in which you least want to be.
-Michael Thacker