John Wesley on John 10:18

I lay it down of myself - By my own free act and deed. I have power to lay it down, and I have power to take it again - I have an original power and right of myself, both to lay it down as a ransom, and to take it again, after full satisfaction is made, for the sins of the whole world. This commission have I received of my Father - Which I readily execute. He chiefly spoke of the Father, before his suffering: of his own glory, after it. Our Lord's receiving this commission as mediator is not to be considered as the ground of his power to lay down and resume his life. For this he had in him self, as having an original right to dispose thereof, antecedent to the Father's commission. But this commission was the reason why he thus used his power in laying down his life. He did it in obedience to his Father.