“The general character and disposition of the Rationalist are, I think, not difficult to identify. At bottom he stands (he always stands) for independence of mind on all occasions, for thought free from obligation to any authority save the authority of 'reason'. His circumstances in the modern world have made him contentious: he is the enemy of authority, of prejudice, of the merely traditional, customary or habitual. His mental attitude is at once sceptical and optimistic: sceptical, because there is no opinion, no habit, no belief, nothing so firmly rooted or so widely held that he hesitates to question it and to judge it by what he calls his 'reason'; optimistic, because the Rationalist never doubts the power of his 'reason' (when properly applied) to determine the worth of a thing, the truth of an opinion or the propriety of an action.”

1920s, Authority and Religious Liberty (1924)

The Art of the Theatre (1925), p. 171
Context: Once the curtain is raised, the actor ceases to belong to himself. He belongs to his character, to his author, to his public. He must do the impossible to identify himself with the first, not to betray the second, and not to disappoint the third. And to this end the actor must forget his personality and throw aside his joys and sorrows. He must present the public with the reality of a being who for him is only a fiction. With his own eyes, he must shed the tears of the other. With his own voice, he must groan the anguish of the other. His own heart beats as if it would burst, for it is the other's heart that beats in his heart. And when he retires from a tragic or dramatic scene, if he has properly rendered his character, he must be panting and exhausted.

Source: Obedience to Authority : An Experimental View (1974), p. 121
Context: When an individual wishes to stand in opposition to authority, he does best to find support for his position from others in his group. The mutual support provided by men for each other is the strongest bulwark we have against the excesses of authority. (Not that the group is always on the right side of the issue. Lynch mobs and groups of predatory hoodlums remind us that groups may be vicious in the influence they exert.)

Rationalism in Politics and Other Essays (1962)

Revised edition, 1985. p. 175.
Ceremonial Chemistry (1974)

Part 2: Metaphysical Rebellion; also quoted in Albert Camus : The Invincible Summer (1958) by Albert Maquet, p. 86; a remark made about the Marquis de Sade
The Rebel (1951)

Source: The Tales of Alvin Maker, Seventh Son (1987), Chapter 9.

Ex parte Rev. James Bell Cox (1887), L. R. 20 Q. B. D. 19.

On the advisableness of improving natural knowledge (1866) http://www.gutenberg.org/dirs/etext01/thx1410.txt
1860s
Context: The improver of natural knowledge absolutely refuses to acknowledge authority, as such. For him, scepticism is the highest of duties; blind faith the one unpardonable sin. And it cannot be otherwise, for every great advance in natural knowledge has involved the absolute rejection of authority, the cherishing of the keenest scepticism, the annihilation of the spirit of blind faith; and the most ardent votary of science holds his firmest convictions, not because the men he most venerates hold them; not because their verity is testified by portents and wonders; but because his experience teaches him that whenever he chooses to bring these convictions into contact with their primary source, Nature — whenever he thinks fit to test them by appealing to experiment and to observation — Nature will confirm them. The man of science has learned to believe in justification, not by faith, but by verification.