God replied, "I will be with you. And you will know that I am the one who sent you, when you worship me on this mountain after you have led my people out of Egypt."
Aaron will speak to the people for you, and you will be like me, telling Aaron what to say. I will be with both of you as you speak, and I will tell each of you what to do.
When you are arrested, don't worry about what you will say. You will be given the right words when the time comes. But you will not really be the ones speaking. Your words will come from the Holy Spirit.
But the Holy Spirit will come and help you, because the Father will send the Spirit to take my place. The Spirit will teach you everything and will remind you of what I said while I was with you.
So when I want to speak to them, I will choose one of them to be a prophet like you. I will give my message to that prophet, who will tell the people exactly what I have said.