Why was Jesus Christ made flesh?
The prime cause was free grace. It was love in God the Father, to send Christ; and love in Christ that He came to be incarnate. Love was the intrinsic motive. Christ is God-man, because He is a lover of man. Christ came to us, out of pity and love. Not our deserts—but our misery, made Christ take flesh. Christ’s taking flesh was a plot of free grace, and a design of pure love. God Himself, though Almighty, was overcome with love! Christ incarnate, is nothing but ‘love’ covered with flesh! As Christ’s assuming our human nature was a master-piece of wisdom, so it also was a monument of free grace!
Thomas Watson, A Body of Divinity