Therefore David blessed the Lord in the presence of all the assembly; and David said: “Blessed art thou, O Lord, the God of Israel our father, for ever and ever.
and the prophet Jeremiah said, “Amen! May the Lord do so; may the Lord make the words which you have prophesied come true, and bring back to this place from Babylon the vessels of the house of the Lord, and all the exiles.
Otherwise, if you bless with the spirit, how can any one in the position of an outsider say the “Amen” to your thanksgiving when he does not know what you are saying?
And the four living creatures, each of them with six wings, are full of eyes all round and within, and day and night they never cease to sing, “Holy, holy, holy, is the Lord God Almighty, who was and is and is to come!”