Therein you are both wrong.

You lay the stress upon the desire apart from the soul, Miss Brewster lays the stress on the soul apart from the desire, and in point of fact soul and desire are the same thing.
"However," I continued, "Miss Brewster is right in contending that temptation is temptation whether the man yield or overcome.

Fire is fanned by the wind until it leaps up fiercely.

So is desire like fire.
It is fanned, as by a wind, by sight of the thing desired, or by a new and luring description or comprehension of the thing desired.

There lies the temptation.