1881: Tabernacle Shadows p. 100-1
But the human female was originally a part of the man made in God’s image, and is still (although temporarily separate for the purposes of human propagation) a part of the man-neither being complete alone. As the perfect man was named Adam, so, when made twain, "God called their name Adam"-the headship remaining with the male, who was thus made the caretaker or preserver of the female as a part of his own body. (Ephesians 5:23, 28) This sexual division did not make Adam imperfect: it merely divided his perfections between two bodies of which he was still the "head."
The Scriptures indicate that ultimately, by the close of the "times of restitution," all (male and female) shall be restored to the perfect condition-the condition represented in Adam before Eve was separated from him. We do not understand that either males or females will lose their identity, but that each will take on the qualities now lacking. If this thought be the correct one, it would seem to imply that the extreme delicacy of some females and the extreme coarseness of some males are incident to the fall, and that restitution to a perfection in which the elements of the two sexes would be perfectly blended and harmonized would be the ideal humanity of God’s design. Our dear Redeemer, when he was "the man Christ Jesus," was probably neither coarse and brawny nor effeminate. In him the mental strength and a grandeur of manhood blended most delightfully with the noble purity, tenderness and grace of true womanhood. Was he not the perfect man who died for our race and redeemed both sexes? Let us not forget that as a man he had no help-mate: should he not therefore have been complete in himself to pay the full corresponding price for Adam (male and female)? Either thus was Eve represented in the great ransom or by her husband as her "head"-else mother Eve was not ransomed at all, a thought which would conflict with other scriptures.
Although this was an early book, it was a cornerstone of the WTS library for several decades.
Interesting that the suggestion is made that Jesus, being perfect, was androgynous.