For we cannot observe any alteration to be made in, or operation upon anything, but by the observable change of its sensible ideas; nor conceive any alteration to be made, but by conceiving a change of some of its ideas.
2.

Power, active and passive.
Power thus considered is two-fold, viz.

as able to make, or able to receive any change.

The one may be called ACTIVE, and the other PASSIVE power.

Whether matter be not wholly destitute of active power, as its author, God, is truly above all passive power; and whether the intermediate state of created spirits be not that alone which is capable of both active and passive power, may be worth consideration.