My dear brethren, we are already one. We imagine we are not. What we have to recover is our original unity. What we have to be is what we are. Thomas Merton
The question becomes how do we reconnect with our universal unity? Meditation is one readily available method. I have PTSS. Early in my recovery, I felt vulnerable to physical assault during meditation while lying on my back. One day something was different. I remained connected with my breath and melted into the floor. It was amazing.
Unfortunately, experiences with non-duality frequently expand beyond words so I shan't try.
Because of that experience so many years ago, I usually meditate once or twice daily.
I look forward to reading about other's experiences with non-duality and meditation.