When you go to a Broadway play, you don't show up and the actors are all there without a script, "Play starts in 15 minutes, let's decide what we're going to do. What's the plot? What character will I play? How will the drama unfold"? The script has already been written. Long before the actors ever arrive, the writer has already decided what's going to take place. When you walk in the theater, there's not an empty stage, the carpenters don't show up and say, "Okay, let's build some sits. What props are you going to need"? The lighting director, "Tell me the scene, so I can get some lights. Let me figure it all out". The stage has already been set. The props are already in place. The script already finalized.
In the same way you didn't show up on planet earth, and God say, "Okay, let me figure out a script for them. Let me figure out what role they're going to play". You weren't born into an empty stage. God didn't say, "I have to think about what environment they should be in, what family I should use, what people, what experiences". Long before you arrived God wrote a script for you. The fact that you're here is a sign that the stage has been set, all the props are in place, the people that you need.