Albert Barnes' Notes on the Whole Bible - John 3:6
That which is born of the flesh - To show the necessity of this change, the Saviour directs the attention of Nicodemus to the natural condition of man. By “that which is born of the flesh” he evidently intends man as he is by nature, in the circumstances of his natural birth. Perhaps, also, he alludes to the question asked by Nicodemus, whether a man could be born when he was old? Jesus tells him that if this could be, it would not answer any valuable purpose; he would still have the same... read more
The Pulpit Commentary - John 3:6
That which hath been born of the flesh, is flesh. σάρξ is not the physical as opposed to the spiritual or immaterial. nor is σάρξ necessarily sinful, as we see from John 1:14 , but as it often appears in John's writing and Paul's, σάρξ is the constituent element of humanity as apart from grace— humanity (body, intellect, heart, conscience, soul, spirit) viewed on its own side and merits and capacity, without the Divine life, or the Divine supernatural inbreathing. The being born... read more