“For thou verily givest thanks well, but the other is not edified.”
King James Version (KJV)
14:15 I will pray with the spirit, but I will pray with the understanding also - I will use my own understanding, as well as the power of the Spirit. I will not act so absurdly, as to utter in a congregation what can edify none but myself.
14:16 Otherwise how shall he that filleth the place of a private person - That is, any private hearer. Say Amen - Assenting and confirming your words, as it was even then usual for the whole congregation to do.
14:19 With my understanding - In a rational manner; so as not only to understand myself, but to be understood by others.