What was the difference between Moses' first and second appearances to the people?
On Moses’ first appearance to the people, they rejected him, asking who made him ruler and judge. On his second appearance, after forty years at the burning bush, God sent him as ruler and deliverer, and the people followed him, so he became their deliverer.
Les explains that Stephen’s point is a pattern of the second time. Moses came the first time to deliver the people, but they refused him, saying, Who made thee a ruler and a judge? After another forty years, at the burning bush in Sinai, God sent the same Moses to be ruler and deliverer. The second time they followed him, and he became their deliverer. Les says the same will be true of Christ: the first time they rejected Him, but the second time they will acclaim Him.