The skeptic does not mean him who doubts, but him who investigates or researches, as opposed to him who asserts and thinks that he has found.

Among all these passionate hearts and all these undoubting minds there was one skeptic. How did he happen to be there? From juxtaposition. The name of this skeptic was Grantaire, and he usually signed with this rebus: R. Grantaire was a man who took good care not to believe in anything.

This, I feel, is missing a vital point: that the sceptic is often a totally honest person who, for perfectly good, sound reasons, simply cannot see a case for belief. In fact many -- like Courty Bryan -- admit that they would like to be convinced, but find it impossible.

A skeptic wants to see the truth. A cynic wants to see you depressed.

Intellectualism, though by no means confined to doubters, is often the sole piety of the skeptic.

Although he never admitted himself to be an atheist as such, he was clearly and unarguably the most vividly elegant and eloquent skeptic of them all. I'm referring, of course, to the great Scottish philosopher David Hume.

The majority of mankind is lazy-minded, incurious, absorbed in vanities, and tepid in emotion, and is therefore incapable of either much doubt or much faith; and when the ordinary man calls himself a sceptic or an unbeliever, that is ordinarily a simple pose, cloaking a disinclination to think anything out to a conclusion.

What then is man to do in this state of affairs? Is he to doubt everything, to doubt if he is awake, whether he is being pinched or burned? Is he to doubt whether he is doubting, to doubt whether he exists? No one can go that far, and I maintain that a perfectly genuine sceptic has never existed.

[T]he modern man who has ceased to believe, without ceasing to be credulous, hangs, as it were, between heaven and earth, and is at rest nowhere.

Scepticism may be theoretically irrefutable, but even the sceptic must ‘act … and live, and converse, like other men’, since human nature gives him no choice.

But the new rebel is a skeptic, and will not entirely trust anything. He has no loyalty; therefore he can never be really a revolutionist. And the fact that he doubts everything really gets in his way when he wants to denounce anything. For all denunciation implies a moral doctrine of some kind; and the modern revolutionist doubts not only the institution he denounces, but the doctrine by which he denounces it. . . . As a politician, he will cry out that war is a waste of life, and then, as a philosopher, that all life is waste of time. A Russian pessimist will denounce a policeman for killing a peasant, and then prove by the highest philosophical principles that the peasant ought to have killed himself. . . . The man of this school goes first to a political meeting, where he complains that savages are treated as if they were beasts; then he takes his hat and umbrella and goes on to a scientific meeting, where he proves that they practically are beasts. In short, the modern revolutionist, being an infinite skeptic, is always engaged in undermining his own mines. In his book on politics he attacks men for trampling on morality; in his book on ethics he attacks morality for trampling on men. Therefore the modern man in revolt has become practically useless for all purposes of revolt. By rebelling against everything he has lost his right to rebel against anything.

"The worst speculative Sceptic ever I knew, was a much better Man than the best superstitious Devotee & Bigot."
"I must inform you, too, that this was the way of thinking of the Antients on this Subject. If a Man made Proffession of Philosophy, whatever his Sect was, they alaways expected to find more Regulaity in his Life and Manners, than in those of ignorant & illiterate."

The man who believes that the secrets of the world are forever hidden lives in mystery and fear. Superstition will drag him down.

A paranoid man is a man who knows a little about what's going on.