As a Catholic Christian and a Zen Buddhist I find no difficulty. It's a non-difficult middlemost.
The continual exchange of center and circumference finds me in the middle of this dance of perception and actuality.
Difficulty arises when the thought arises that there is a decision to be made between two options. When you reside in the between there is no decision. What is there is what is there. One? Other? Not two things: just one-an-other. Which is another way of saying there is no other, only this, where you are/who you are.
I'm never not who and where I have been. I will always be where and who I am.
What is there to be cut away with the blade of decision? What 'two' is perceived as needing excision and extrication in or from our mind?
To dwell in the middle of the world, of existence, of my life, is to dwell in the middle of the question: Which would you prefer to cut away -- your inhaling or your exhaling?
There is no decision required. I stand between the options and, for now, right here, practice both inhaling and exhaling -- with great delight and happy realization of the gift.
I practice accepting simplicity, anonymous service, accommodating silence. (asasas)
In its most non-dualistic form, existential freedom comes only from realization of the "true man":
"If you want to freely live or die, go or stay, to take off or put on [your clothes], then right now recognize the man who is listening to my discourse. He is without form, without characteristics, without root, without source, and without any dwelling place, yet is brisk and lively." (Discourse XIV)
Freedom arises when we recognize who we really are -- and in our normal way of being, it is shattered when we think, speak, and act from habitual identification with body/mind phenomena. The process of such identification, this "thirst for becoming" (a deeply insightful teaching of the Buddha himself), is manifest in the endless stream of our personal tendencies, divided neatly by Buddhists into the triad of desire, aggression, and ignorance. When we realize ourselves to actually be this free inner agent, then we become that freedom itself.
In the chronicle of Lin-chi's rugged teaching, we see a beautiful example of action without hesitation. His wild ways -- shouting, beating, knocking over tables, and so on — is but skillful means in accordance with clarity, without fixed root. The true man, ever and always, is free and unperturbed. In Discourse XVIII, we hear a teaching which sounds curiously like the Chinese Taoist, Chuang Tzu:
"Only you, the follower of the Way right now before my eyes listening to my discourse, [only you] enter fire and are not burned, enter water and are not drowned, enter the three hells as though strolling in a pleasure gardens, enter the realms of the hungry ghosts and the beasts without suffering their fate. How can this be? There are no dharmas [genuine objective phenomena] to be disliked.
"
(from, "Lin-chi and the True Man without Rank"
by Scott Mandelker, Ph.D.
http://www.buddhanet.net/lin-chi.htm
This time of year I note Jesus, Stephen, John, the Holy Innocents, Mary, Joseph, Angels, Animals, Francis, Story, Imagination, Hopes, Longings, Christ-Mind, and New Beginnings.
I also note Siddhartha, Tathagata, Kuan Yin, Dogen, Bodhidharma, Lin-chi, Layman Pang, Bankai, Ryokan, Meditation Bell, Zafu, Only-Don't-Know, InterBeing, Buddha-Mind, and Incense.
Mostly, I note that everywhere I look, in whatever direction gaze falls, the middle of everything seems to surround and sustain the no-effort no-choice no-other... presence of perfection which is what is. This 'what is' (as you know) has been known by and called by different names. You'll be able to recollect the name or names most familiar to you. For me, these days, like in Faust, I have no names, for:
“Names are but noise and smoke, obscuring heavenly light.” (Johann Wolfgang von Goethe)
We have poets. We are fortunate. Even in their attempts to convey a point of view they are blessedly circumflex.
13. Pied Beauty
GLORY be to God for dappled things—
For skies of couple-colour as a brinded cow;
For rose-moles all in stipple upon trout that swim;
Fresh-firecoal chestnut-falls; finches’ wings;
Landscape plotted and pieced—fold, fallow, and plough; 5
And áll trádes, their gear and tackle and trim.
All things counter, original, spare, strange;
Whatever is fickle, freckled (who knows how?)
With swift, slow; sweet, sour; adazzle, dim;
He fathers-forth whose beauty is past change: 10
Praise him.
(Poem by Gerard Manley Hopkins, 1844–89. Poems. 1918)
This dappling stippling adazzling -- this being the between we are -- with asasas gratefulness!
Wind blows, water flows, nobody knows.
Say it: Ain't life grand?!