"The fewer facts you have in support of an opinion, the stronger your emotional attachment to that opinion." - Anonymous

"Some men are just as sure of the truth of their opinions as are others of what they know." - Aristotle, Nichomachean Ethics

"The man who never alters his opinion is like standing water, and breeds reptiles of the mind." - William Blake, The Marriage of Heaven and Hell

"My opinions may have changed, but not the fact that I'm right." - Ashleigh Brilliant

"Every new opinion, at its starting, is precisely in a minority of one." - Thomas Carlyle, On Heroes, Hero-Worship and the Heroic in History

"The world is not run by thought, nor by imagination, but by opinion." - Elizabeth Drew, The Modern Novel

"Nothing is more conducive to peace of mind than not having any opinion at all." - Georg Christoph Lichtenberg, Aphorisms

"I have often wondered how it is that every man loves himself more than all the rest of men, but yet sets less value on his own opinion of himself than on the opinion of others." - Marcus Aurelius, Meditations

"To observations which ourselves we make, we grow more partial for th' observer's sake." - Alexander Pope

"Opinion has caused more trouble on this little earth than plagues or earthquakes." - Voltaire

"I've got better things to do than argue with every wrong-headed crackpot with an ignorant opinion! I'm a busy man! 'I' say, either agree with me or take a hike! I'm right, period! End of discussion!" - Calvin in Bill Watterson's 'Calvin & Hobbes' comic strip

"Too often we...enjoy the comfort of opinion without the discomfort of thought." - Kennedy, John F.