The Power of Amen

Amen

דברים כז, כו: וְ אָמַר כָל -הָעָם אָמֵן

Baal HaTurim remarks that the gematria of the word אמן is 91 which is equivalent to that of the combined Names of 'Havayah' and Adnus' (the written and spoken special name of HaShem). Hence Chazal have said that someone who answers 'Amen' to a Berachah is greater than the person who recited the Berachah, since his declaration incorporates two Names of Hashem as against the one Name recited by the person who recites the Berachah.