Human happiness, as we have noted in the introduction to this volume, is attained only through _doing what the organism was built to do, in an environment that is favorable_. Marriage is only the attempt of two people to attain these two ends individually, mutually and simultaneously. Difficulties of Double Harness ¶ Now, since it is almost impossible for one to achieve happiness when untrammeled and free, is it to be wondered at that so few achieve it in double harness? For the difficulties to be surmounted are doubled and the helps are halved by the presence of a running mate. Mere Marriedness is not Mating ¶ That "two can live on less than one" is not true--but it is nearer the truth than that two can find ultimate happiness together easier than either can find an approximation of happiness alone. This is not saying that any one who is unmated can have happiness as complete as that which comes to the rightly mated--for nothing else in life can compare with that--but they must be RIGHTLY MATED, not merely _married_. No one who has observed or thought on this subject will deny that it is a thousand times better not to be married at all than to be married to the wrong person. Secrets Told by Statistics ¶ Surveys of the causes for divorce during the past ten years in the United States have revealed some startling facts--facts which only prove again that Human Analysis shows us the truth about ourselves as no science has ever shown it to us before. One of the most illuminating facts these surveys have revealed is that _only those men and women can be happy together whose natures automatically encourage each other in the doing of the things each likes to do, in the way each likes to do them_. Inborn inclination determines the things every human being prefers to do, concerning all the fundamental activities of his life, and also the manner in which he prefers to do them. These inborn inclinations, as we have previously pointed out, are written all over us in the unmistakable language of type. When we know a man's type we know what things he prefers to _do_ in life's main experiences and _how_ he prefers to do them. And we know that unless he is permitted to do approximately what he _wants_ to do in approximately the _way_ he prefers, he becomes unhappy and unsuccessful. Infatuation No Guide ¶ These biological bents are so deeply embedded in every individual that no amount of affection, admiration, or respect, or passion for any other individual suffices to enable any one to go through long years doing what he dislikes and still be happy. Only in the first flush of infatuation can he sacrifice his own preferences for those of another. After a while passion and infatuation ooze away. Nature sees to that, just as she sees to their coming in the first place. Then there return the old leanings, preferences, tendencies and cravings inherent in the type of each. The Real "Reversion to Type"