Exception to the rule

Why should the exception be the rule?

Does the fact that someone else does something give us permission to do it as well?

If you believe something, what others do is of no consequence.

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"You cannot believe in anything in the world, if you admit even once that perhaps your opponents are right, and not you. There is but one truth in the world, and it is all yours. If you are not sure of it, stay at home; but if you are sure, don't look back"

Vladimir Jabotinsky