All the situations to which we have hitherto directed attention are, as already observed, neither true actions in themselves nor indeed the stimulative source of such action. Their determination was to a greater or less degree the purely occasional circumstance or condition, or an action in itself of no significance, in which a substantive content was expressed in such a way that its specific character appeared as a mere harmless play, in which nothing of a truly serious nature was implied. The full seriousness and weighty import of a situation can only begin when we find in it the element of disruption, where the determination itself exposes an essential aspect of difference, and by its opposition to something else becomes the source of a collision. The _collision_ arises, as we are now considering it, in an act of _violation_, which is unable to retain its character as such, but is compelled to find a new principle of unity; it is a change in the previously existent condition of harmony, a change which is still in process. The collision is, however, not an _action_, and is to be taken simply as stimulus to action to all that characterizes the situation. And this is true, although the contradiction in which the collision is enclosed may be the result of previous action. As an example of this we may cite the trilogies of the ancients, which carry forward the main theme by presenting at the close of one drama the collision which forms the stimulative impulse of the next, which, in its return, renders necessary the resolution which is carried out by the third. And, moreover, for this very reason that the collision always requires some resolution attendant on this conflict of opposing elements, the more a situation is full of it the more it is peculiarly adapted to the subject-matter of dramatic art, it being the especial claim of that art to present beauty in its completest and profoundest development. Sculpture, on the contrary, is not wholly suited to give embodiment to any action, through which the great spiritual forces are manifested either in their division or reconciliation, and indeed the art of painting, despite its more extended spatial significance, is only able to objectify a single moment of action.