It has been seen that the object of a sane upbringing is increasingly to direct all emotion towards objects which involve other people. Now basically the situation of being finite is an infinitely frustrating one, which would be expected to arouse sensations of desperation and aggression - as indeed it may sometimes be seen to do in very young children. I am aware that I must be careful, in using the word aggression, to state that I do not mean aggression directed towards people. What I mean is an impersonal drive directed against reality - it is difficult to give examples but it may be presumed that geniuses who are at all worthy of the name preserve a small degree of this. However, since all emotion must be directed towards people, it is obvious that the only form of aggression which a sane person can understand is aggression against people, which is probably better described as sadism or cruelty.