What does Jeremiah 1:5 mean?

Before you were even formed in your mother’s womb, I already knew you. Before you were born, I set you apart for a purpose. I chose you to speak for me to the nations. Jeremiah 1:5 - Modern Text Bible

(God tells Jeremiah that his calling wasn’t an accident or afterthought—God had a plan for him before he even existed. Jeremiah’s role as a prophet is part of God’s bigger story.)