Acts 7:23-25

Verse 23

When he was full forty years old - This was a general tradition among the Jews: "Moses was forty years in Pharaoh's court, forty years in Midian, and forty years he served Israel."

To visit his brethren - Probably on the ground of trying to deliver them from their oppressive bondage. This desire seems to have been early infused into his mind by the Spirit of God; and the effect of this desire to deliver his oppressed countrymen was his refusing to be called the son of Pharaoh's daughter - see Heb 11:24, and thus renouncing all right to the Egyptian crown, choosing rather to endure addiction with the people of God than enjoy the pleasures of sin for a season.
Verse 24

Smote the Egyptian - See this explained, Exo 2:11, Exo 2:12 (note).
Verse 25

He supposed his brethren would have understood, etc. - He probably imagined that, as he felt from the Divine influence he was appointed to be their deliverer, they would have his Divine appointment signified to them in a similar way; and the act of justice which he now did in behalf of his oppressed countryman would be sufficient to show them that he was now ready to enter upon his office, if they were willing to concur.
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