Nothing in all the world is more dangerous than sincere ignorance and conscientious stupidity.
Martin Luther King Jr

The time is always right to do what is right.
Martin Luther King Jr

Injustice anywhere is a threat to justice everywhere. We are caught in an inescapable network of mutuality, tied in a single garment of destiny. Whatever affects one directly, affects all indirectly.
Martin Luther King Jr

He who passively accepts evil is as much involved in it as he who helps to perpetrate it. He who accepts evil without protesting against it is really cooperating with it.
Martin Luther King Jr

Peace is more precious than diamonds or silver or gold
Martin Luther King Jr (Nobel Acceptance Speech, 1963)

Scientology is both immoral and socially obnoxious...It is corrupt, sinister and dangerous. It is corrupt because it is based on lies and deceit
Justice Latey

Living is easy with eyes closed, misunderstanding all you see.
John Lennon

A heretic is a man who sees with his own eyes.
Gotthold Ephraim Lessing

The scientist is not a person who gives the right answers, he is one who asks the right questions.
Claude Levi-Strauss

Authority has every reason to fear the skeptic, for authority can rarely survive in the face of doubt.
Robert M. Lindner

The actions of men are the best interpreters of their thoughts.
John Locke

Every sect as far as reason will help them, gladly use it; when it fails them, they cry out it is a matter of faith, and beyond reason.
John Locke

It is a good morning exercise for a research scientist to discard a pet hypothesis every day before breakfast. It keeps him young.
Konrad Lorenz

Truth in science can best be defined as the working hypothesis best suited to open the way to the next better one.
Konrad Lorenz

Reason is the enemy of faith.
Martin Luther

Thinkers aspired to know, or dared to doubt, where bigots had been content to wonder and to believe.
Lord Macaulay

He who seeks to deceive will always find someone who will allow himself to be deceived.
Niccolò Machiavelli

Emancipate yourselves from mental slavery. None but ourselves can free our minds.
Bob Marley (Redemption Song)

I count religion as but a childish toy, and hold that there is no sin but ignorance.
Christopher Marlowe

Give to us clear vision that we may know where to stand and what to stand for - because unless we stand for something, we shall fall for anything.
Peter Marshall

Religion is the sigh of the suppressed creature, the feelings of a heartless world, just as it is the spirit of unspiritual conditions. It is the opium of the people.
Karl Marx

But what a fool believes he sees, no wise man has the power to reason away.
McDonald/Loggins

If I hadn't believed it, I wouldn't have seen it.
Marshall McLuhan

As my ancestors are free from slavery, I am free from the slavery of religion.
Butterfly McQueen

The curse of man, and cause of nearly all of his woes, is his stupendous capacity for believing the incredible.
H. L. Mencken

For centuries, theologians have been explaining the unknowable in terms of the-not-worth-knowing.
H. L. Mencken

It is the natural tendency of the ignorant to believe what is not true. In order to overcome that tendency it is not sufficient to exhibit the true; it is also necessary to expose and denounce the false.
H. L. Mencken

The way to deal with superstition is not to be polite to it, but to tackle it with all arms, and so rout it, cripple it, and make it forever infamous and ridiculous. Is it, perchance, cherished by persons who should know better? Then their folly should be brought out into the light of day, and exhibited there in all its hideousness until they flee from it, hiding their heads in shame.
H. L. Mencken

Moral certainty is always a sign of cultural inferiority. The more uncivilized the man, the surer he is that he knows precisely what is right and what is wrong. All human progress, even in morals, has been the work of men who have doubted the current moral values, not of men who have whooped them up and tried to enforce them. The truly civilized man is always skeptical and tolerant.
H. L. Mencken

I am suspicious of all the things that the average citizen believes.
H. L. Mencken

The objection to Puritans is not that they try to make us think as they do, but that they try to make us do as they think.
H. L. Mencken

We must respect the other fellow's religion, but only in the same sense and to the extent that we respect his theory that his wife is beautiful and his children smart.
H. L. Mencken

The most curious social convention of the great age in which we live is the one to the effect that religious opinions should be respected.
H. L. Mencken

Sunday School: A prison in which children do penance for the evil conscience of their parents.
H. L. Mencken

I will call no being good who is not what I mean when I apply that epithet to my fellow creatures; and if such a creature can sentence me to hell for not so calling him, to hell I will go.
John Stuart Mill

You never question the truth of something until you have to explain it to a skeptic.
Donald Miller

The Old Testament is responsible for more atheism, agnosticism, disbelief - call it what you will - than any book ever written; It has emptied more churches than all the counterattractions of cinema, motor bicycle, and golf course.
A. A. Milne

I respect faith, but doubt is what gets you an education.
Wilson Mizner

Science has proof without any certainty. Creationists have certainty without any proof.
Ashley Montague

Narrow minds devoid of imagination. Intolerance, theories cut off from reality, empty terminology, usurped ideals, inflexible systems. Those are the things that really frighten me. What I absolutely fear and loathe.
Haruki Murakami

The compass that today guides this timeless endeavour is scientific inquiry. It is science that gazes outward, providing the grand questions that challenge us to journey farther and farther from home. But it is also science that peers inward, exploring previously inaccessible areas of the Earth, and asking the practical questions that help us to make Earth safer, protect our citizens, and expand our economy.
NASA Roadmap "Exploring our Planet for the Benefit of Society", 2005

First they came for the Communists but I was not a Communist so I did not speak out. Then they came for the Socialists and the Trade Unionists but I was not one of them, so I did not speak out. Then they came for the Jews but I was not Jewish so I did not speak out. And when they came for me, there was no one left to speak out for me.
Martin Niemoeller

The term "allopathic" is pathognomonic for brain rot.
Jan Willem Nienhuys

Homeopathy is one big circus of mutually contradictory and crazy ideas.
Jan Willem Nienhuys

Great intellects are skeptical.
Friedrich Nietzsche

Convictions are more dangerous enemies of truth than lies.
Friedrich Nietzsche

The two great European narcotics, alcohol and Christianity.
Friedrich Nietzsche

The Christian resolution to find the world ugly and bad has made the world ugly and bad.
Friedrich Nietzsche

In Christianity neither morality nor religion come into contact with reality at any point.
Friedrich Nietzsche

Here the ways of men part: if you wish to strive for peace of soul and pleasure, then believe; if you wish to be a devotee of truth, then inquire.
Friedrich Nietzsche