All these examples are concerned with the repression of inborn reflexes, expressive movements, and instincts, but acquired habits are no less difficult to withstand. Many games are founded on the assumption that the ability to do so is a proof of will power, and emphasizes the freedom and self-control of the subject. It is particularly well illustrated in vocal exercises. To omit a particular syllable in a familiar rhythmic verse, or possibly several verses, requires a sudden check to the accustomed movements. A well-known German example is the song— “Europa hat Ruhe, Europa hat Ruh’, Und wenn Europa Ruhe hat, So hat Europa Ruh’”— in which the first, second, or third syllable of the word Europa, or even the word or all the other words, are omitted. Kreis mentions a similar play for children. It consists simply in substituting other meanings for the words (stretching for bending, for example), so that when the order is given “Bend,” the arm is stretched out, etc.[357] There is such a thing, too, as playful resistance of old habits. How many smokers resolve as a sort of jest to do without cigars for a week! It is the merest playful experimentation; they want to see if they are really absolute slaves of the pleasant vice, or whether the habit is still under the control of their will. If the experiment succeeds, they contentedly go back to their cigars; it is not at all a serious effort to reform. Many frivolous persons play thus with their habits, and take a childish delight in the little conquests achieved by their will, yet without permanently or seriously altering their manner of living. PART II _THE PLAYFUL EXERCISE OF IMPULSES OF THE SECOND OR SOCIONOMIC[358] ORDER_ I. FIGHTING PLAY Our conception of experimentation includes a large number of phenomena having the common tendency to bring into action the manifold inborn predispositions of the organism, but without reference to those instincts by means of which the relation of the individual to other living creatures is regulated. In experimentation only the more general needs, such as are indubitably grounded in the nature of the organism, are allowed expression, in such a manner as to bring into action the sensor and motor apparatus as well as the higher mental faculties. The individual would exhibit similar qualities in isolation; he plays with himself, not with his relations to others, and even when association exists, as, for instance, in ball-catching, he recognises at the same time that experimental play is involved. Now, however, we enter on the consideration of such play as is intentionally directed toward other beings, and first on our list is the inborn impulse to fight. Walther von der Vogelweide has shown the power of this instinct in the impressive lines: