Extrinsical

A body cannot move, unless it be moved by some extrinsical agent: we may easily frame a conceit, how absurd it is to think that a body, by a quality in it, can work upon itself.

Neither is the atom by any extrinsical impulse diverted from its natural course.

Outward objects, that are extrinsical to the mind; and its own operations, proceeding from powers intrinsical, and proper to itself, which, when reflected on by itself, become also objects of its contemplation, are the original of all knowledge.