When you practice seeing and hearing, it is easy to understand that it is not self, that it is nature happening. Because we think that seeing is me, wrong view is already present. Who is seeing? I’m seeing.
Now, every time you see or hear, just recognize that seeing or hearing is happening. If you repeatedly recognize seeing or hearing, it is not difficult to understand that it is a natural process.
Just knowing seeing or hearing is not difficult. Do you have to do anything to see or hear? You just open your eyes and seeing is already happening; when there is a sound, hearing is already happening (the faculty or function of seeing and hearing). But you say ‘I’m hearing or I’m seeing’; actually, it is nature happening.
Every time you are aware that seeing and hearing are happening, it is not difficult to understand that it is not personal.