Again the negative, in responding, may express itself in the manner of the positive, and then there must result a clash or conflict; for then there is no scope for the positive. Or else the positive, expressing itself with intensity, may drive back the negative. Or the positive may find the response of the negative so narrow that it finds itself deprived of sufficient opportunity for its full expression. In such cases harmony is not possible, because the negative does not furnish sufficient opportunity or scope for the positive.