John Calvin Commentary Acts 7:34

"I have surely seen the affliction of my people that is in Egypt, and have heard their groaning, and I am come down to deliver them: and now come, I will send thee into Egypt." — Acts 7:34 (ASV)

In seeing I have seen. God promises now that He will deliver His people, so that He may appoint Moses to be His minister anew, because the former objection was removed by such a long period of time. For God is said to see our miseries when He has regard for us and is careful for our safety; just as He is said, on the other hand, to shut His eyes and turn His back when He seems to treat our cause lightly.

In a similar way, He is said to come down. He does not need to move from His place to help us, for His hand reaches throughout heaven and earth; but this is expressed in terms of our understanding. For, since He did not deliver His people from their affliction, it might seem that He was far off and was occupied with some other matter in heaven.

Now He says that the Israelites will perceive that He is near to them. The main point is this: that Moses, knowing the will of God, should not doubt to follow Him as a guide, and all the more boldly commit himself to the deliverance of the people, which he knew was the work of God.

For we must note that He says that He heard the mourning of the people. For although He has regard for those who are in misery and unjustly oppressed, yet when we lay our mournings and complaints in His lap, He is especially moved to have mercy; although this word can also refer to those blind and confused complaints that are not directed to God, as it is often understood elsewhere.