Passivity, we said the other day, didn’t we, is what does not move, does not act, vibrate, respond – well, an inert passivity is just this, what is absolutely unconscious, inactive, what does not respond; whereas the other day we described a passivity which responds, which opens and is receptive, but doesn’t move, doesn’t act, which is the opposite of… Let us take passivity as the opposite of activity, something that does not act but is receptive and receives.
But an inert passivity is a passivity that receives nothing, it is like a stone; for instance, we say the stone has an inert passivity, don’t we?… like the soil or sand. It is not quite true, for there is nothing which is not at least a little receptive to forces. But still, the more we go towards something we call unconscious, the more is it inert and passive at the same time. That is it.
So, an inert passivity in someone is a kind of incapability of vibrating, receiving, opening himself, responding, something that’s quite unconscious and does not move in any way!
Ref: Questions And Answers 1954