What does the Bible say about God's calling of Moses?

In Exodus 3, God calls Moses to be the instrument of deliverance for the Israelites after 400 years of captivity in Egypt. Despite Moses' hesitation and feelings of inadequacy, God's response assures him that He will be with him, exemplifying God's sovereignty in choosing Moses to fulfill His divine purpose. This account underscores that God's plans are established in eternity and that He prepares His servants for their roles, as seen in Moses' 40 years in Pharaoh's palace followed by 40 years in the desert.