Their story
Isaac is born to Abraham (100 years old) and Sarah (90 years old) in Genesis 21, fulfilling the covenant promise given twenty-five years earlier at Abraham's call. His name comes from the Hebrew Yitzchak, "he laughs," commemorating Sarah's laughter when the angel first announced the promise (Genesis 18:12) and her joy at his birth (Genesis 21:6). Genesis 22 records the near-sacrifice of Isaac at Moriah: Abraham is commanded to offer his son as a burnt offering; Abraham takes Isaac up the mountain with wood and fire but no lamb; Isaac asks, "where is the lamb for a burnt offering?"; Abraham answers, "My son, God will provide himself a lamb"; at the last moment the angel of the LORD stops Abraham and a ram is provided as substitute. Isaac is passive in the narrative; his cooperation with Abraham's obedience shapes Christian typological reading of Jesus's cooperation with the Father's will at Gethsemane. In Genesis 24 Abraham sends his servant Eliezer to Mesopotamia to find a wife for Isaac; the servant identifies Rebekah at the well outside Nahor when she offers water to him and to his camels. Isaac marries Rebekah at age forty; after twenty years of childlessness Rebekah conceives twins, Esau and Jacob (Genesis 25:19-26). Isaac favors Esau; Rebekah favors Jacob. Genesis 26 records the LORD renewing the covenant promise with Isaac, and Isaac's dealings with Abimelech of Gerar. In Genesis 27, in his old age and blindness, Isaac is deceived by Jacob (at Rebekah's instigation) into blessing him instead of Esau. Isaac dies at 180 years of age (Genesis 35:28-29) and is buried by his sons Esau and Jacob in the cave of Machpelah.
Why they matter
Isaac matters in Christian tradition as the son of covenant promise whose birth to Sarah at ninety demonstrates the pattern of God bringing life through what seems impossible, and whose near-sacrifice at Moriah shapes Christian typological reading of the crucifixion. Hebrews 11:17-19 explicitly reads Genesis 22 as a figure of the resurrection: Abraham "offered up Isaac... accounting that God was able to raise him up, even from the dead." Jesus's genealogies in Matthew 1 and Luke 3 trace back through Isaac. The patriarchal triad ("God of Abraham, God of Isaac, God of Jacob"), invoked by God at the burning bush (Exodus 3:6) and by Jesus in the resurrection dispute with the Sadducees (Matthew 22:32), preserves Isaac's canonical place as the second patriarch.
Key Bible passages
What people often get wrong
Isaac was not a small child at the near-sacrifice. Jewish and Christian traditions vary on his age at Moriah; he is old enough to carry the wood (Genesis 22:6) and to ask his father questions. Some Jewish tradition places him at thirty-seven; some Christian reading places him at a teen age. The narrative does not specify.
Isaac is not the father of the twelve tribes of Israel. His son Jacob (renamed Israel in Genesis 32) becomes the father of the twelve tribes through Jacob's own twelve sons.
Isaac's blessing of Jacob instead of Esau is not a mistake corrected. Even after the deception is exposed, Isaac says of Jacob: "yea, and he shall be blessed" (Genesis 27:33). The blessing is understood to be effective and irrevocable, part of the sovereign purpose that runs through the patriarchal narrative.
Common questions
Who was Isaac in the Bible?
Isaac was the second patriarch of Israel, son of Abraham and Sarah born through the covenant promise at Genesis 21. He is the father of Jacob and Esau, through whom the covenant line continues.
What is Isaac best known for?
Isaac is best known for the near-sacrifice at Moriah (Genesis 22), when Abraham obeys the LORD's command to offer him as a burnt offering, and for the deception at the blessing (Genesis 27), when Jacob receives the paternal blessing intended for Esau.
What is the meaning of the name Isaac?
Isaac comes from the Hebrew Yitzchak meaning "he laughs" or "he will laugh." Genesis 17:17 records Abraham's laughter at the promise, Genesis 18:12 records Sarah's laughter, and Genesis 21:6 records Sarah's joy at Isaac's birth: "God hath made me to laugh."
Why does Isaac matter to Christians?
Isaac's near-sacrifice at Moriah shapes Christian typological reading of the crucifixion; Hebrews 11:17-19 reads Genesis 22 as a figure of the resurrection. Jesus's genealogies trace back through Isaac, and the patriarchal triad ("God of Abraham, God of Isaac, God of Jacob") preserves Isaac's canonical place across the New Testament.