Hopkins, of course, is far from a neutral observer.

Instead, however, she simply became a neutral observer.

Monckton is also far from being a neutral observer.

In that sense, he is no neutral, detached observer.

He is hardly a neutral and dispassionate observer.

At what point do they stop being a neutral, silent observer?

His position was hardly that of a neutral observer.

For my part, I remained a quiet but an attentive observer.

Mine is not the observation of a neutral observer.

Unfortunately for the reader, the author is not a neutral observer of this debate.

Try to be a neutral observer of your thoughts and feelings.

You become a neutral observer to your thoughts and feelings.

Imagine being a neutral observer of your thoughts.

I am going to remain a neutral observer and see what happens.

Nonetheless, it appears that he is not a neutral observer.