A question will here very naturally arise: How can we account for the fact that so many wise and good men have contended for a necessitated will, as if they were contending for the great basis of all morality and religion? For example, take Edwards himself as a man of great thought and of most fervent piety. In the whole of his treatise, he argues with the air and manner of one who is opposing great errors as really connected with a self-determined will. What can be stronger than the following language: "I think that the notion of liberty, consisting in a _contingent self-determination of the will_, as necessary to the morality of men's dispositions and actions, is almost inconceivably pernicious; and that the contrary truth is one of the most important truths of moral philosophy that ever was discussed, and most necessary to be known." The question is a fair one, and I will endeavour to answer it. 1. The impossibility of a self-determining will as being in itself a contradictory idea, and as leading to the consequence of affirming the existence of effects without causes, takes strong hold of the mind in these individuals. This I believe, and hope to prove in the course of this treatise, to be a philosophical error;--but it is no new thing for great and good men to fall into philosophical errors. As, therefore, the liberty consisting in a self-determining will, or the _liberty of indifference_, as it has been technically called, is conceived to be exploded, they endeavour to supply a _liberty of spontaneity_, or a liberty lying in the unimpeded connexion between volition and sequents.