I have never found Plotinus' definition of spirituality as "the flight of the alone to the alone" to be especially appealing. Here is Milosz on prayer, as usual doubting and faithful, with the insight that we are all in this together.
You ask me how to pray to someone who is not.
All I know is that prayer constructs a velvet bridge
And walking it we are aloft, as on a springboard,
Above landscapes the color of ripe gold
Transformed by a magic stopping of the sun.
That bridge leads to the shore of Reversal
Where everything is just the opposite and the word is
Unveils a meaning we hardly envisioned.
Notice: I say we; there, every one, separately,
Feels compassion for others entangled in the flesh
And knows that if there is no other shore
We will walk that aerial bridge all the same.