Thus Jansen's theories of conversion melt into predestination; although, in doing so, they somewhat modify its grimness.
He did not minutely analyse the doctrine of predestination as Luther, Calvin and Zwingli did, contenting himself with the summary "Our Salvation is of God, our perdition of ourselves."
Against the Calvinists the synod of 1672 therefore aimed its rejection of unconditional predestination and of justification by faith alone, also its advocacy of what are substantially the Roman doctrines of transubstantiation and of purgatory; the Oriental hostility to Calvinism had been fanned by the Jesuits.
Sikhism mainly differs from Christianity in that it inculcates the transmigration of the soul, and adopts a belief in predestination, which is universal in the East.
He had embraced the Motazilite doctrine about free will and predestination, and was in particular shocked at the opinion which had spread among the Moslem doctors that the Koran was the uncreated word of God.