When God designed the redemption of mankind, his great wisdom appears in that he pitched upon his own, his only-begotten, Son, to be the person to perform the work. He was a redeemer of God’s own choosing, and therefore he is called in Scripture, God’s elect, (Isa. lxii. 1.) The wisdom of choosing this person to be the redeemer, appears in his being every way a fit person for this undertaking. It was necessary, that the person that is the redeemer, should be a divine person.—None but a divine person was sufficient for this great work. The work is infinitely unequal to any creature. It was requisite, that the redeemer of sinners, should be himself infinitely holy. None could take away the infinite evil of sin, but one that was infinitely far from and contrary to sin himself. Christ is a fit person upon this account.
It was requisite, that the person, in order to be sufficient for this undertaking, should be one of infinite dignity and worthiness, that he might be capable of meriting infinite blessings. The Son of God is a fit person on this account. It was necessary, that he should be a person of infinite power and wisdom; for this work is so difficult, that it requires such an one. Christ is a fit person also upon this account. It was requisite, that he should be a person infinitely dear to God the Father, in order to give an infinite value to his transactions in the Father’s esteem, and that the Father’s love to him might balance the offence and provocation by our sins. Christ is a fit person upon this account. Therefore called the beloved, (Eph. i. 6.) He hath made us accepted in the beloved.
It was requisite, that the person should be one that could act in this as of his own absolute right: one that, in himself, is not a servant or subject; because, if he is one that cannot act of his own right, he cannot merit any thing. He that is a servant, and that can do no more than he is bound to do, cannot merit. And then he that has nothing that is absolutely his own, cannot pay any price to redeem another. Upon this account Christ is a fit person; and none but a divine person can be fit.—And he must be a person also of infinite mercy and love; for no other person but such an one would undertake a work so difficult, for a creature so unworthy as man. Upon this account also Christ is a fit person.—It was requisite that he should be a person of unchangeable perfect truth and faithfulness; otherwise he would not be fit to be depended on by us in so great an affair. Christ is also a fit person upon this account.
The wisdom of God in choosing his eternal Son, appears, not only in that he is a fit person; but in that he was the only fit person of all persons
~Jonathan Edwards~
The Works of Jonathan Edwards Vol. 2 (Peabody, MA; Hendrickson Publishers, Inc; 2007) p. 142. Miscellaneous Discourses – The Wisdom of God Displayed in the Way of Salvation – Section 1.
The Old Guys 