Psychology (n.) is the study of conscious experience driven by largely unconscious forces.
Psychology (n.) is the one science blamed for admitting its gaps: no one despises astronomy for showing where knowledge melts into haze, but people want from psychology satisfactions of another sort.
Psychology (n.) became a natural science the moment it assumed the mind was unconscious in itself, with gaps in experience filled by unbroken lawful sequences.
Psychology (n.) that scratches the surface of many minds and fills the gaps with philosophy is tempting, but no substitute satisfies science.
Psychology (n.) is the science everyone thinks himself expert in, like the nurse who claimed to know babies because she had been one.
Psychology (n.) that cannot explain dreams cannot explain normal mental life either, and has no claim to be a science.
Psychology (n.) is the one science everyone thinks he already knows; philosopher and man in the street alike behave as amateur psychologists.
Psychology (n.) is a knife that cuts both ways, as Dostoevsky said; used as a weapon in argument, each side can turn it on the other.