I was reading through 1 Corinthians 12-14 in my morning devotions today and came upon 1 Corinthians 14:15 which says: "What is it then? I will pray with the spirit, and I will pray with the understanding also: I will sing with the spirit, and I will sing with the understanding also. " -- 1 Corinthians 14:15 I usually do my devotions with Calvin's commentary (if applicable) or Henry (if Calvin does not have a comment on the passage) and so I turned over to Calvin for his reading on this passage. Here is what he says: For context here is 1 Corinthians 14:14-16: "For if I pray in an unknown tongue, my spirit prayeth but my understanding is unfruitful. 15 What is it then? I will pray with the spirit, and I will pray with the understanding also: I will sing with the spirit, and I will sing with the understanding also. 16 Else when thou shalt bless with the spirit, how shall he that occupieth the room of the unlearned say Amen at thy giving of thanks, seeing he understandeth not what thou sayest?"