What does Exodus 3:13 mean?
When God commanded Moses to go back to Egypt, in order to bring Israel out of slavery, Moses' first response was an expression of doubt. God replied with reassurances, both of His own presence, and with prophecy of Moses' eventual success.Here, Moses provides his second objection to God's call. His first excuse related to his identity: "Who am I?" (Exodus 3:11). The excuse given here relates to God's identity. Moses' question is not entirely inappropriate. He expects people to ask a very natural question: who sent you to lead us? Specifically, Moses wants to know how to answer the question of "which God" he is representing. This interesting question leads to a unique revelation of the Lord's name in the next verse; this statement will become an integral part of God's identity as revealed in the rest of Scripture.
The phrase, "The God of your fathers," relates back to a similar comment made by God in verse 6, implying that the One speaking is the God of Moses' ancestors. Moses uses an important shift in perspective, however. In Moses' words, this being is "the God of your fathers," as spoken by Moses to the Jewish people. In other words, this emphasizes God's relationship to the Hebrew people, rather than to Moses. Moses has a conflicted identity with the Hebrews. He is a Jew, but was not raised as a Jew. He is—ethnically—one of the enslaved Israelis, yet lives in exile in freedom from that slavery. As a result, Moses is fearful to approach the Jewish people with claims that he should have authority over them. Even when he lived in Egypt, the Hebrew people saw no reason to accept his commands (Exodus 2:14).
So, Moses seeks advice from God regarding how to respond, still hoping God will choose someone else instead.