“Blessed be the Lord who has given rest to his people Israel, according to all that he promised; not one word has failed of all his good promise, which he uttered by Moses his servant.
And Ezra blessed the Lord, the great God; and all the people answered, “Amen, Amen,” lifting up their hands; and they bowed their heads and worshiped the Lord with their faces to the ground.
Then the Levites, Jeshua, Kadmiel, Bani, Hashabneiah, Sherebiah, Hodiah, Shebaniah, and Pethahiah, said, “Stand up and bless the Lord your God from everlasting to everlasting. Blessed be thy glorious name which is exalted above all blessing and praise.”
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?
Blessed be the God and Father of our Lord Jesus Christ! By his great mercy we have been born anew to a living hope through the resurrection of Jesus Christ from the dead,