Opinons

Loyalty to a petrified opinion never broke a chain or freed a human soul.

~ Mark Twain

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If we aren't willing to change our opinions, then we are never open to new information or discoveries or knowledge.  We can - because we are creative beings - make any set of facts conform to the beliefs we want to hold.  Not all facts or information are accurate or good.  Some are actually bad.  They weren't researched well, they weren't properly documented or reviewed.  They weren't examined with a critical eye.

In short, in order to create informed opinions, we must take the good and the bad.  We, in fact, must take them both.  

And there you have the facts of life.