Do not hold your Views too firmly. Every fool is fully convinced, and every one fully persuaded is a fool: the more erroneous his judgment the more firmly he holds it. Even in cases of obvious certainty, it is fine to yield: our reasons for holding the view cannot escape notice, our courtesy in yielding must be the more recognised. Our obstinacy loses more than our victory yields: that is not to champion truth but rather rudeness. There be some heads of iron most difficult to turn: add caprice to obstinacy and the sum is a wearisome fool. Steadfastness should be for the will, not for the mind. Yet there are exceptions where one would fail twice, owning oneself wrong both in judgment and in the execution of it.