From Murray's Redemption: Accomplished and Applied
It is God the Father who is the specific agent in the effectual call. This aspect of Biblical teaching we are too liable to overlook. We think of the Father as the person of the trinity who planned salvation and as the specific agent in election. And we think properly when we do so. But we fail to discern other emphases of Scripture and we do dishonour to the Father when we think of him simply as planning salvation and redemption. The Father is not far removed from the effectuation of that which he designed in his eternal counsel and accomplished in the death of his Son; he comes into the most intimate relation to his people in the application of redemption by being the specific and
particular actor in the inception of such application.