Concerning the Calvinist claim that we are controlled by motives and our choices and actions are therefore necessitated:
Let us now contemplate these motives which are said to act upon the mind so as necessarily to influence the will. Let us look them full in the face, and ask the question, What are they? Are they intelligent beings, capable of locomotion? Are they endued with a self-moving energy? Yea, more: Are they capable of not only moving themselves, but also of imparting their force to something external to themselves, so as to coerce action in that which could not act without them? If these questions be answered in the negative, then it will follow that motives, considered in themselves, can no more act on the mind so as necessarily to determine the will, than a world can be created by something without existence. If these questions be answered in the affirmative, then it will follow that motives at least are free agents – capable of acting without being acted upon, and endued with self-controlling and self-determining energy. Necessitarians may fall upon either horn of the dilemma; but upon which horn soever they fall, their system must perish.
If the attempt be made to evade this by saying that motives do not act themselves, but God is the agent acting upon man, and determining his will through the instrumentality of motives – if this be the meaning, then I demand, why not call things by their right names? Why attribute the determination of the will to the influence of motives, and at the same time declare that motives are perfectly inefficient, capable of exercising no influence whatever? Is not this fairly giving up the question, and casting “to the moles and to the bats” the revered argument for necessity, founded upon the influence of motives?
Again, to say that motives exercise no active influence, but are only passive instruments in the hands of God by which he determines the will by an immediate energy exerted at the time, is the same as to say that God is the only agent in the universe; that he wills and acts for man; and, by his own direct energy, performs every physical and moral act in the universe, as really and properly as he created the worlds; and then that he will condemn and punish men everlastingly for his own proper acts! Is this the doctrine of philosophical necessity? Truly it is. And well may we say this is fatalism! This is absurdity! [source]