To me, they are two completely different things. The first is the act of passion, and what drives you is the motivation of making things more wonderful. The latter is where you just accept the things around you, in essence you’ve given up.
Google defines them as following.
Rage, a vehement desire or passion.
“a rage for absolute honesty informs much western art”
synonyms: craze, passion, fashion, taste, desire, craving, appetite, trend, vogue, fad, enthusiasm, love, obsession, compulsion, weakness, fondness, fixation, fetish, mania, fascination, preoccupation.
Inertia, a tendency to do nothing or to remain unchanged.
“the bureaucratic inertia of the various tiers of government”
synonyms: inactivity, inaction, inactiveness, inertness, passivity, apathy, accidie, malaise, stagnation, dullness, enervation, sluggishness, lethargy, languor, languidness, listlessness, torpor, torpidity, idleness, indolence, laziness, sloth, slothfulness;
Both passion and inertia are contagious. While one is awesome to have and spiral upwards, the other spirals downward and needs to be broken ASAP. There is always a way. Pave the way. Or, a bit harsch but as Dan North once put it; Change organization or change organization. Not everyone wants to change, or your paths are completely different.
If you are in a state of inertia, you really really need to do something about it. Although, being in the middle of it and it might (probably) have been a downward spiral, you might not even know about it. But if you think actively, are you passionate? Do you have that driving force and hunger? Do you do your utmost to make things more wonderful? Both for yourself and those around you.