Nothing exists except atoms and empty space; everything else is opinion.
Democritus

Everyone is entitled to our opinion.
Tre Cool

Between friends differences in taste or opinion are irritating in direct proportion to their triviality.
W. H. Auden

I am disillusioned enough to know that no man's opinion on any subject is worth a damn unless backed up with enough genuine information to make him really know what he's talking about.
H. P. Lovecraft

Every man has a right to his opinion, but no man has a right to be wrong in his facts.
Bernard Baruch

I haven't much opinion of words. They're apt to set fire to a dry tongue, that's what I say.
Ellen Glasgow

Truthiness is tearing apart our country, and I don't mean the argument over who came up with the word. I don't know whether it's a new thing, but it's certainly a current thing, in that it doesn't seem to matter what facts are. It used to be, everyone was entitled to their own opinion, but not their own facts. But that's not the case anymore. Facts matter not at all. Perception is everything.
Stephen Colbert

A woman tells her doctor, 'I've got a bad back.' The doctor says, 'It's old age.' The woman says, 'I want a second opinion.' The doctor says: 'Okay - you're ugly as well.'
Tommy Cooper

If you are of the opinion that the contemplation of suicide is sufficient evidence of a poetic nature, do not forget that actions speak louder than words.
Fran Lebowitz

Contrary to popular opinion, the hustle is not a new dance step - it is an old business procedure.
Fran Lebowitz

They that approve a private opinion, call it opinion; but they that dislike it, heresy; and yet heresy signifies no more than private opinion.
Thomas Hobbes

There is in my opinion a great similarity between the problems provided by the mysterious behavior of the atom and those provided by the present economic paradoxes confronting the world.
Paul Dirac

When a man gives his opinion he's a man. When a woman gives her opinion she's a bitch.
Bette Davis

In my opinion, he only may be truly said to live and enjoy his being who is engaged in some laudable pursuit, and acquires a name by some illustrious action, or useful art.
Sallust

All those who offer an opinion on any doubtful point should first clear their minds of every sentiment of dislike, friendship, anger or pity.
Sallust

In my opinion it is less shameful for a king to be overcome by force of arms than by bribery.
Sallust

It is the nature, and the advantage, of strong people that they can bring out the crucial questions and form a clear opinion about them. The weak always have to decide between alternatives that are not their own.
Dietrich Bonhoeffer

In every age there has been a stream of popular opinion that has carried all before it, and given a family character, as it were, to the century.
Mary Wollstonecraft

A baby is God's opinion that life should go on.
Carl Sandburg

Works of art, in my opinion, are the only objects in the material universe to possess internal order, and that is why, though I don't believe that only art matters, I do believe in Art for Art's sake.
E. M. Forster