Great assurance! I love Titus 1:2 which says that it is impossible for God to lie. Genesis 18:10 was Abraham’s promise. It says, “…I will certainly return to you according to the time of life, and behold, Sarah your wife shall have a son…”

Genesis 21:1 says, “And the Lord visited Sarah as He had said and the Lord did for Sarah as He had spoken.” I wonder if Abraham recounted God’s words ever so often, thanking Him for what He would do.

Verse 2 says, “For Sarah conceived and bore Abraham a son in his old age, at the set time of which God had spoken to him.” God has a set time fulfilled through His impeccable timing. Not before nor after, but in the exact timing of His purpose.

Ephesians 1:11 says, “…being predestined according to the purpose of Him who works all things according to the counsel of His will.”

Romans 4:16 says, “Therefore it is of faith that it might be according to grace…” We are saved by grace, and He empowers us to live by grace.