What does Acts 7:6 mean?
Stephen is explaining to the Sanhedrin and a crowd in Jerusalem that neither the Mosaic law nor the temple are required for Jews to worship God. The first Jewish God-worshiper, Abraham, did not inherit the land where his descendants were to worship God. He did not have a temple to worship in. And he did not have a law to tell him how to worship. And, yet, he is the founding patriarch from whom all God-worshiping Jews come, including Stephen's accusers.Stephen continues his narrative about God's promises to Abraham. Some of God's covenant with Abraham was positive: Abraham's wife Sarah would have a son, that son's descendants would inherit the land of Canaan, and through Abraham's offspring all the nations of the world would be blessed (Genesis 15:4–7, 18–20; 12:2–3, 7). But Abraham, himself, would not inherit the land, and his descendants would be enslaved for four hundred years (Genesis 15:13).
Events progressed as God promised. Long after Abraham and his son Isaac had died, Abraham's great-grandson Joseph saved Egypt from a famine that affected Canaan as well. Joseph brought his father and brothers down to Egypt. After Joseph's death, however, a new Pharaoh enslaved his family. Four hundred years later, God called up Moses to announce terrible curses on the Egyptians and rescue for the Israelites (Genesis 46:1–7; Exodus 12:33–42).
A "sojourner" is a resident foreigner. The Israelites were sojourners in their four hundred years in Egypt, but Abraham, Isaac, and Jacob's families were also sojourners before the Israelites went to Egypt (Exodus 6:4).
In another attempt to throw doubt on the inerrancy of the Bible, critics point out that Exodus 12:40–42 claims the Israelites were enslaved for 430 years. A closer examination will show the text says they "lived in Egypt" for 430 years. Apparently, after Jacob brought his sons and their families to Egypt to escape the famine, they lived in peace for thirty years. Then the new Pharaoh enslaved them (Exodus 1:8–14). Or, Stephen is simply speaking in the same rounded numbers people have always used in conversation.