(62

Ch. 11

mental activity, the complexity of the mental actions would almost necessarily in all probability, as previously indicated explained, entail the loss of the more simple & definite & simple instincts. There could remain a general wish to aid the members of the same community, with some mutual sympathy & that pleasure & advantages of association. Thirdly, the mental faculties having become highly developed, vivid images of all past actions & motives would be incessantly be passing through the brain of each individual member; & that feeling of life dissatisfaction, which invariably results, as we shall immediately see, from any unsatisfied instinct, would arise, as often as the individual it was perceived that the enduring & always present social instinct had yielded to some other instinct at the time stronger, but not enduring in its nature & or leaving a very vividimpression. It is clear that many instinctive instinctive desires, such as that of hunger, are in their nature of short duration; nor after being satisfied are they