De acquirenda, retinenda, et amittenda possessione enunciationes C

XXII.
But we also require this regarding the thing, that it be vacant.

XXIII.
We call vacant that which is possessed by no one.

XXIV.
For if the thing is not vacant, even if we occupy it with the intent of holding it for ourselves, we do not possess it.

XXV.
Because two cannot possess the same thing in its entirety.

XXVI.
The service of the body consists in apprehension. That apprehension, however, is either natural and true, or civil and fictitious.

XXVII.
Natural or true is that which is done by the corporeal act itself, namely when we touch movable things or enter upon immovable ones.

XXVIII.
Civil or fictitious is when we embrace a thing more by affection than by corporeal act.

XXIX.
This, however, has a place only if the thing is transferred to us by the will of him who possessed it previously.

XXX.
For if we acquire the thing without the will of the prior possessor, this civil mode of apprehending does not suffice, but there is need for a natural one.

XXXI.
But we are said to obtain a thing without the will of the prior possessor either when it is possessed by no one, or when we comprehend it against the will of him who possesses it.