When Jesus Christ died on the cross, he ACCOMPLISHED what the Father had sent him to do, namely secure the redemption of his people. “Tetelestai.” “It is finished (brought to completion).” He did not merely make redemption a POSSIBLE outcome; he actually secured it for his chosen people.
If, as many believe, he only made salvation possible and subject to the “free will” of men as the determining factor, then we must recognize the possibility that no one would be saved. In fact, knowing the depths of the depravity of the human heart, it is more certain that, if left up to the corrupt will of unregenerate man, no one would be saved.
If the redemption that Jesus purchased with his blood only made salvation possible, then on what basis could it truthfully and confidently be sung in heaven, “by your blood you ransomed people for God from every tribe and language and people and nation and you have made them a kingdom and priests to our God, and they shall reign on the earth”? (Revelation 5:9-10)
To God be the glory; great things he has DONE!