What does Acts 7:18 mean?

Despite his accusers' claims, Stephen and other Jewish Jesus-followers hold the Mosaic law, the temple, and Moses in the highest respect. But they hold an even higher view of how God has worked in the people of Israel. God's prophets didn't start with Moses. His blessing didn't start with the Law. And His worship certainly didn't start with the construction of the temple. The Jews first worshiped God and received His blessings through His first prophet, Abraham.

Stephen has already reminded his audience how Joseph's rejection by his brothers led the Israelites to Egypt where Joseph was able to provide for their needs (Acts 7:9–16). He has also reminded them how that stability and protection led to a population boom in the families of the twelve brothers (Acts 7:17). But both Joseph and the pharaoh he served died, and the new pharaoh merely saw the Israelites as a threat, not as the family of the man who rescued Egypt from famine (Exodus 1:6–10).

God revealed to Abraham some of these details of the Israelites' time in Egypt. He said, "Know for certain that your offspring will be sojourners in a land that is not theirs and will be servants there, and they will be afflicted for four hundred years" (Genesis 15:13). God didn't always use Moses, the Law, or the temple to bless His people. Some of His greatest blessings occurred in Egypt while His people suffered in slavery for four hundred years.