Our cautious ancestors, when yawning, blocked the way to the entrance of evil spirits by putting their hands before their mouths. We find a reason for the gesture in the delicacy of manner which forbids an indecent exposure.
In wartime we identify ourselves with the nation, and its interests are the interests of our primal selves.
Imagery is not past but present. It rests with what we call our mental processes to place these images in a temporal order.
Social psychology is especially interested in the effect which the social group has in the determination of the experience and conduct of the individual member.
No very sharp line can be drawn between social psychology and individual psychology.