Everything happens within not outside of you. You think birds and sounds are out side of you, because you think. Meanwhile everything is within. If you don't think, nothing never happens.
You are already what you are and already enlightened. However, the only difference is you think, which mean is you are just lost in the thought process. That's all.
Chooser is an illusion as birth. The idea of world is not even real. How do you know you are in the world or breathing? Because you learn from so called human beings?