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If ceaseless vigilance is the price of liberty, more so is it true that ceaseless criticism of ever new opinions and ever new views, however distasteful, bizarre, and paradoxical, is the price of truth.

— Boris Sidis The Source and Aim of Human Progress (1919)

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More quotes by Boris Sidis

Human institutions depend for their existence and stability on the impulse of self-preservation and its close associate, — the fear instinct.

Nervous Ills their Cause and Cure (1922)

Not purpose but chance is at the heart of mental life.

The Foundations of Normal and Abnormal Psychology (1914)

The principle of recognition of evil under all its guises is at the basis of the true education of man.

Philistine and Genius (1919)

The general tendency of evolution is from structure to function, from bondage to freedom of the individual elements.

Multiple Personality: an Experimental Investigation into Human Individuality (1904)

Self-preservation is the central aim of all life-activities.

Nervous Ills their Cause and Cure (1922)

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Quote text and notes from Wikiquote: Boris Sidis (page history), available under CC BY-SA 4.0. Source quality and labels are our own summary of what Wikiquote records.