20 For all the promises of God find their Yes in him. That is why it is through him that we utter our Amen to God for his glory.
Amen - so it is, so be it, may it be fulfilled. It was a custom, which passed over from the synagogues to the Christian assemblies, that when he who had read or discoursed, had offered up solemn prayer to God, the others responded Amen, and thus made the substance of what was uttered their own. (Strong's)