20 For all the promises of God in Him are Yes, and in Him Amen, to the glory of God through us.
Verse 20 confirms what precedes–Christ was not “yes and no,” but the reality of all the promises of God was achieved in Him.
20 For all the promises of God in Him are Yes,
Every promise of God comes true in Christ (Lu 24:44). They are trustworthy commitments from God. In contrast to the “yes” and “no” thinking of others, God performs what He promises. We can count on Him. He is entirely consistent with His Word. There is no equivocation in what He promises.
and in Him Amen,
“Amen” means so be it or truly. God is always consistent with the truth of who He is. He will fulfill His promises “in Him,” that is, in Christ. God Himself is the immutable verification or oath of what He says He 6:18; Re 3:14). It is our response to affirm the message about Christ as trustworthy. We give a definite “yes” of agreement with God about His promises.
to the glory of God through us.
The affirmation of God being true to Himself always glorifies Him. Paul’s team glorified God by their ministry of being faithful to God’s Word.
God’s character guarantees the fulfillment of His promises
The entire range of thousands of God’s promises is secure because of who and what He is. If God proved faithful in fulfilling His promises in Christ, He will fulfill His promises to believers today.