The Lord had promised a son to Abram (Genesis 15:4) and Abram believed Him. However, as time passed by, Sarai took matters into her own hands. She ‘suggested’ to Abram that he take her Egyptian maid and have a child by her. Genesis 16:2 says, “…Abram heeded the voice of Sarai.” He did not stand in what God had said.
Fast forward. Ishmael was born. Genesis 16:16 says that Abram was eighty-six years old. Then the Lord made a covenant with Abram. The sign of the covenant was circumcision. Then God changed Abram’s name to Abraham, and Sarai’s name to Sarah. Both reflected His promise to them. Each time their new name was spoken, they were reminded of His words.
Genesis 17:21 is a key verse in the story. It says, “But My covenant I will establish with Isaac, whom Sarah shall bear to you at this SET TIME next year.” It seems that God waited until they could do nothing to help Him. Fast forward to Romans 4 and we see the power of believing.
Romans 4:19 says, “And not being weak in faith, he did not consider his own body, already dead (since he was about a hundred years old) and the deadness of Sarah’s womb.”
Verse 20-21 says, “He did not waver at the promise of God through unbelief, but was strengthened in faith, giving glory to God, and being fully convinced that what He had promised He was able to perform.”
Now back to Genesis 21:1-2. It says, “And the Lord visited Sarah as He had said, and the Lord did for Sarah as He had spoken. For Sarah conceived and bore Abraham a son in his old age, at the SET TIME of which God had spoken to him.”
The Lord has a SET TIME in all His promises. He will fulfill His word. It will not return to Him void. He cannot not deny Himself. He cannot lie. His words to Abraham are eternal words for us to hold onto. Genesis 18:14 says, “Is anything too hard for the Lord?”
The answer is no! Our faith-focus must be on the Lord and not our circumstances. He is able to change our circumstances in a moment, but when He doesn’t, we can trust Him to take us through them, because He is Trustworthy.