John 6:63 It is the Spirit who gives life, the flesh profits nothing; the words which I have spoken to you are spirit and are life.
The Greek word for words, here and in v. 68, is rhema, which denotes the instant and present spoken word. It differs from logos (used for Word in 1:1), which denotes the constant word. Here the words follows the Spirit. The Spirit is living and real, yet He is very mysterious, intangible, and difficult for people to apprehend; the words, however, are substantial. First, the Lord indicated that for giving life He would become the Spirit. Then He said that the words He speaks are spirit and life. This shows that His spoken words are the embodiment of the Spirit of life. He is now the life-giving Spirit in resurrection, and the Spirit is embodied in His words. When we receive His words by exercising our spirit, we get the Spirit, who is life. (John 6:63, footnote 3 in the Recovery Version Bible)