George Leo Haydock

Amen. That is, assuredly, of a truth. This Hebrew word Amen, is here retained by the example and authority of all the four evangelists, who have retained it. It is used by our Lord as a strong asseveration, and affirmation of the truth. (Challoner) — Not one jot (or not one jota), nor one tittle, i.e. not the least letter, nor stroke of a letter; that is, not the least moral precept. Besides every type and figure of the former law, now by my coming shall be fulfilled. (Witham) — Amen , is retained in the Hebrew, Greek, Syriac, and Armenian languages, as well as in all vulgar idioms. It is a term of asseveration, and equivalent to an oath; and in many places, to make the asseveration still stronger, it is repeated. St. Luke very accurately translates it into nai . St. Paul and St. John unite them nai and amen . (Haydock)