In the eyes of an illusionist, yes, although as far as I am aware, only illusionists separate those parts from one another without damaging the soul as a whole.

Power is the least damaging section to draw from, as it constantly replenishes itself. Strength is similarly safe, but much more difficult to safely separate from Length, which is much more dangerous to remove. And under no circumstances would I ever willingly draw from the Potency of a soul.

[A pause.] Though I suppose those terms mean far more to an illusionist than to someone who does not understand the process...