And His name will be called…Counsellor… – Isaiah 9:6

Men take weeks and months and sometimes years, to think out a thing that is surrounded with difficulties; they have to find the clue with much research; enveloped in folds of mystery, they have to take off first one garment and then another, before they find out the naked glorious truth. Not so God. God’s deliberations are as flashes of lightning; they are as wise as if he had been eternally considering, but the thoughts of His heart, though swift as lightning, are as perfect as the whole system of the universe. The reason why God is represented as holding a council, if I think rightly, is this: that we might understand how wise God is. “In the multitude of counsellors there is wisdom.” It is for us to think that in the council of the Eternal Three, each Person in the undivided Trinity being omniscient and full of wisdom, there must have been the sum total of all wisdom. It was to show the unanimity and co-operation of the sacred Persons: God the Father hath done nothing alone in creation or salvation. Jesus Christ hath done nothing alone; for even the work of His redemption, albeit that He suffered in some sense alone, needed the sustaining hand of the Spirit, and the accepting smile of the Father, before it could be completed. God said not, “I will make man,” but “Let Us make man in Our own image.” God saith not merely, “I will save,” but the inference from the declarations of Scripture is, that the design of the three Persons of the blessed Trinity was to save a people to Themselves, who should show forth Their praise. It was, then, for our sakes, not for God’s sake, the council was held-that we might know the unanimity of the glorious Persons, and the deep wisdom of Their devices. ~ C.H. Spurgeon

https://www.blueletterbible.org/Comm/spurgeon_charles/sermons/0215.cfm