Else if thou bless with the spirit (epei ean eulogh en pneumati). Third class condition. He means that, if one is praying and praising God ( Ephesians 10:16 ) in an ecstatic prayer, the one who does not understand the ecstasy will be at a loss when to say "amen" at the close of the prayer. In the synagogues the Jews used responsive amens at the close of prayers ( Nehemiah 5:13 ; Nehemiah 8:6 ; 1 Chronicles 16:36 ; Psalms 106:48 ). He that filleth the place of the unlearned (o anaplhrwn ton topon tou idiwtou). Not a special part of the room, but the position of the idiwtou (from idio, one's own), common from Herodotus for private person ( Acts 4:13 ), unskilled ( 2 Corinthians 11:6 ), uninitiated (unlearned) in the gift of tongues as here and verses 2 Corinthians 23 . At thy giving of thanks (epi th sh eucaristiai). Just the prayer, not the Eucharist or the Lord's Supper, as is plain from verse 2 Corinthians 17 .