Psychic Activity Quotes
- In the dog two conditions were found to produce pathological disturbances by functional interference, namely, an unusually acute clashing of the excitatory and inhibitory processes,… — Ivan Pavlov
- Man is not distinguished from [the animals] by a special kind of soul, or by any peculiar and exclusive psychic function, but only by a… — Ernst Haeckel
- Demons do not exist any more than gods do, being only the products of the psychic activity of man — Sigmund Freud