That's a great explanation, RnMom. Thanks much.
The call to holiness is nonsensical if we consider how holiness is attained: it is a passive change of ontological state without our participation. It is something that occurred without our volition or doing.
This is made abundantly clear in the grammatical format of the Greek text (perfect, passive, subjunctivean accomplished fact without our participation or volition, such as for example you were born).
So, how can we then be called "to be holy" if holiness is not works-based or subject to free-will? It's like calling all those who were born to stay born! It's nonsense. Greek text doesn't say anything like that.
It is untenable logically. If we can make ourselves holy, then the whole Calvinist and Protestant illusion of being the elect falls down like a house of cards and becomes a Pelagian heresy.