Matthew Poole and continuators on 1 Corinthians 12:21

21 And the eye cannot say unto the hand, I have no need of thee: nor again the head to the feet, I have no need of you .

He names two of the most noble and useful members of the body, the Head and the Eye, which yet cannot tell the hands or the feet, they have no need of them: the wise God having created nothing in vain, but made every member in the body of a man for use, as to the whole, so to the several parts of the body, the hand is useful to the eye, and the feet are of use to the head. The application of this similitude, which the Apostle so much inlargeth upon, we shall have v. 26, 27, &c.