Being Defensive against any and every ideas of belief, can be protective. But, what if the the Defence is actually against the Truth. Won't we suffer loss? Even though being Defensive against any ideas opposite to our belief is protective, there is a risk of we missing out on the Truth. Being Defensive against every idea, is as equally dangerous as accepting every idea without analysing it. Hence, the best we can do is to judge and analyse every idea before we accept or refute it.