Herbart extends his interpretation of feeling and desire to the phenomena of affect[51]  and passion, the “strongest expressions of feeling and desire [respectively]” (SW VI: 75). In both cases it is important to see that the force of both affect and passion inheres in the representations themselves; when these forces are compressed or relaxed beyond the static point, they produce tension within the masses of representations, which manifests itself as affect (Weiss 1928: 90).  Both result from movements, not of individual representations, but of fused representational masses well past their point of equilibrium (SW VI: 75; cf. Weiss 1928: 89). Thus, if a “larger amount of actual representation is raised into consciousness than can subsist there [all at once]”, the result is an “ebullient” affect (SW VI: 75).[52]  By contrast, if a larger mass is banished beneath the limen, the psychic barometer falls as well, resulting in a “melting” affect (SW VI: 75). Just as low atmospheric pressure provokes stormy weather, so too the disappearance of a representational mass loosens and unleashes those masses that remain (SW VI: 75–6). These suddenly far exceed the static point, their violent expression taking the form, e.g., of rage or fear (SW VI: 75–6). This also explains why affects are always transient moods, since representations always strive to return over time to a state of equilibrium (SW VI: 75).[53]