…as He had said… (Genesis 21:1-7).
His word is His bond: What He had promised (v. 1b). There are no loopholes, no equivocations. When God says it, it is signed, sealed, delivered!
When is His word accomplished? From the moment He says it. His word cannot be altered nor delayed. We simply wait for its fulfillment: At the very time God had promised (v. 2).
This also means that I must obey what God says. If His word is immutable, my faith and obedience must be just as steadfast. Just like Abraham: Abraham circumcised him, as God commanded him (v. 4).
Jesus said that the Holy Spirit would help remind us of everything God has said. The same Word that tells us God’s promises is also the same Word that sparks the faith to believe His Word (Romans 10:17).