Who knoweth the spirit of man that goeth upward, and the spirit of the beast that goeth downward to the earth?
Ver. 21. Who knoweth the Spirit?] q.d., Who but a man that is spiritually rational, and rationally spiritual? Who but he that hath "the mind of Christ?" 1Co 2:16 that hath seen the insides of nature and grace? Whether Plato and Cicero believed themselves in what they wrote touching the immortality of the soul, is a great question.