/summa/FS/FSII/FS_Q10:
We must now consider the manner in which the will is moved. Under this head there are four points of inquiry:
(1) Whether the will is moved to anything naturally?
(2) Whether it is moved of necessity by its object?
(3) Whether it is moved of necessity by the lower appetite?
(4) Whether it is moved of necessity by the exterior mover which is God?