Even from the noblest man, the woman of sensitive personality to-day feels an undercurrent as of surprised congratulation when she has anything to say worth his _serious_ attention outside that department of life supposed to belong to her "sphere." Thus man robs his wedded self of a greatness which the dual unity might reach. But in marriage the mutual freedom and respect for opinion, vitally important though it be, is not sufficient for the full development of character. Life demands ever-widening interests. Owing partly to the differentiation of many types of individuals due to the specialisation of civilisation, which interests thoughtful individuals, and partly to the transmutation of his old vagrant instinct, man increasingly desires to touch and to realise the lives of his fellows. In the lives of others our hearts and understanding may find perpetual adventures into the new and strange. Individual human beings, even the noblest and most complex yet evolved, have but a share of the innumerable faculties of the race. Hence even in a supremely happy marriage, which touches, as does the mystic in his raptures, a realisation of the whole universe, there cannot lie the _whole_ of life's experience. Outside the actual lives of the pair there must always be many types of thought and many potentialities which can only be realised in the lives of other people. In the complete human relation friends of all grades are needed, as well as a mate. Marriage, however, in its present form is too often made to curtail the enjoyment of intimate friendships. The reason for this is partly the social etiquette, which, though discarded in the highest levels of society, still lingers in many circles, of inviting the husband and the wife together upon all social occasions. It is true that they are separated at the dinner table, but they are always within the possibility of earshot of each other, which very often deadens their potentialities for being entertaining. The mere fact of being overheard repeating something one may have already said elsewhere is sufficient to prevent some people from telling their best stories, or from expressing their real views upon important matters. And, still more serious barrier to joy, so primitive, so little evolved are we even yet, there is in most human beings a strong streak of sex-jealousy. For either mate to be allowed to go out uncriticised into the world, is to demand, if not more than the other is willing to give, at least a measure of trust which by its rarity appears nowadays as something conspicuously fine. Jealousy, which is one of the most frequent shadows cast by the blight of love, is very apt to sow a distrust in one which makes a normal life for the other partner impossible. It is hard to say in which sex the feeling is more strongly developed. It takes special forms under different circumstances, and if a nature is predisposed towards it, it is one of the most difficult characteristics to eradicate.