Commentaries:
Jesus says in John 6:63 that His "words are spirit, and they are life." These proverbs add that anybody's words are what the Bible calls "spirit." There is nothing material, nothing visible, happening, but words and attitudes nevertheless generate emotional, attitudinal, and behavioral reactions. They can induce and compel powerful reactions, such as murder, on the bad side, or joy unspeakable, where we just do not have the words to communicate that we are so happy, on the good. Yet, nothing really happens except spirit passing from one person to another—nothing, that is, that we would call physical, material. Nothing touches us but the meaning of a word, a disposition, or an attitude that is communicated.
John W. Ritenbaugh
The Holy Spirit and the Trinity (Part Four)