It would be wiser of you not to jump to conclusion too hastily.
I have read Johnston's 'Silent Music' and the one on his Autobiography, quite some time ago. I have not read his other books, e.g.
The Inner Eye of Love: Mysticism and Religion
One of my interest is in all things spirituality which encompassed mysticism, religions [Eastern, Western, Middle], various spiritual approaches, self-development techniques, etc.
Johnston is an expert on Christian meditation and Eastern meditation, especially Zen.
I am VERY familiar with Zen Buddhism and its meditation techniques.
The point with the term 'love' is one cannot move the concept of 'love' from its fundamental groundings.
Here is some notes on the book;
Johnston begins with the mystical tradition itself, its roots and origins, its appearance and significance in the Gospels, the letters of Paul, and the early Church. He explains what mysticism is and is not, and how it is inextricably bound up with love. It is at the level of mysticism, he maintains, that the two traditions of East and West can at last understand one another and begin to work together to heal a broken world. The Inner Eye of Love escorts the reader through the stages of the mystical journey, from initial call to final enlightenment. Johnston compares and contrasts the Oriental and Christian experience, continually revealing new points of commonality The much discussed "dark night of the soul" is seen here in a positive way, as an emptying preliminary to the overbrimming of the soul with the knowledge and love of God.
https://www.amazon.com/dp/082321778...ProductDesc=1#product-description_feature_div
If Johnston believe there are commonalities between the East [Zen, etc.] and West, example the concept of 'love' then that is restricted to the fundamental emotion of 'love' that all and nothing more than that.
Note
Love - Wikipedia
Zen [non-theistic] do not agree with 'love' that is divine.
There is no way Johnston can talk of 'love' without reference [explicit or implied] to the fundamental emotion of 'love' that is activated within the brain.
As such 'love' in the mystical and divine sense must be,
Agape, mystical love, divine love = fundamental love emotion + mystical elements or divine elements.
Note;
"Jesus said unto him, Thou shalt love the Lord thy God with all thy
heart, and with all thy soul, and with all thy
mind. This is the first and great commandment. And the second
is like unto it, Thou shalt love thy neighbour as thyself. On these two commandments hang all the law and the prophets." (
Matthew 22:37-40)
The 'heart' and 'mind' refer to the fundamental neural network of love within the brain in connection with the heart. If not, where else? from the stomach, groins?
Here is a comment on Johnston's Book;
Mystical Theology: The Science of Love
However: (i) t
he book's major downfall seems to be that it deploys the phrase "a cloud of unknowing" as a sort of bail-out phrase for something the author either does not know, or does not have the skilfulness to really 'convey.' Indeed the phrase is so often deployed in this manner one sees it literally dragged kicking and screaming throughout the entire text. The next bailout phrase seems to be "the dark night."
"
Love" is also deployed without any effort to distinguish it from common mediocre (crumbling) notions of the term, which get thrown around like bags of sand in everyday usage. These seem to be like a kind of hangover of Johnson's from writing too many earlier books 'about' mysticism, just as one might write 'about' poetry;
https://www.amazon.com/gp/product/0006277098/ref=dbs_a_def_rwt_hsch_vapi_taft_p1_i1#customerReviews
One point is I have read Johnston's books only for reference which does not mean I agree totally with his views.
Another critical point is your knowledge is SO narrow and shallow but you want to sound like you know a lot.
So far you are making noises only but have not provided any sound and rational arguments with evidences.