Randolph Sinks Foster, in his book, Objections to Calvinism (1852) writes:
[The Confession of Faith states,] “God, from all eternity, did, by the most wise and holy counsel of his own will, freely and unchangeably ordain whatsoever comes to pass; [and now your disclaimer,] yet so as thereby neither is God the author of sin, nor is violence offered to the will of the creature.”
But this disclaimer [God is not the author of sin] by no means relieves my embarrassment — it greatly increases it, by placing you [Calvinist brother] in the attitude, to my mind, of believing a palpable contradiction, namely, that God did cause all things, sin included, yet in such a way that he did not cause sin.”