Charles Darwin

The Expression of the Emotions in Man and Animals Charles Darwin

The three chief principles stated-The first principle-Serviceable actions become habitual in association with certain states of the mind, and are performed whether or not of service in each particular case-The force of habit-Inheritance-Associated habitual movements in man-Reflex actions-Passage of habits into reflex actions-Associated habitual movements in the lower animals-Concluding remarks. I will begin by giving the three Principles, which appear to me to account for most of the expressions and gestures involuntarily used by man and the lower animals, under the influence of various emotions and sensations.