With abundant amplification from everyday experience, this is again practical psychology as applied to your contacts with people- whether personal or professional. The basic facts of human nature and the elements of give and take; getting along in business, with customers, associates, your boss- or as a boss; personality factors in conversation, letters, etc. etc. building a ""winning"" personality; your relationship to your wife and your children; your habits, your mistakes, etc. etc. As these things go (or do they), there's not too much schmaltz and such authorities as Freud, Havelock Ellis, William James, lend caste.