Watching the passing parade, means not being involved, in your own thoughts and feelings and emotions!
The observer can watch themselves and their world from a quiet place, "without the me".
Ever noticed how easy it is to see other people's situation clearly and be blind to your own?
A quiet place where the emotions, feelings and thoughts of our body are independent of us,
we watch from a place where we can't be disturbed (by ourselves or others), a quiet place.
The summation of all that is being reported to the brain is often referred to as sensation,
the total feeling of everything that is going on inside you.