Noetic quality — Although so similar to states of feeling, mystical states seem to those who experience them to be also states of knowledge. They are states of insight into depths of truth unplumbed by the discursive intellect. They are illuminations, revelations, full of significance and importance, all inarticulate though they remain; and as a rule they carry with them a curious sense of authority for after-time.

William James, The Varieties of Religious Experience

Mystical experiences are not just reveries. Nor can they be dismissed with a “your truth / my truth” wave of the hand. Those who have achieved mystical union with God never question the fact. However, as I have shown in other essays, expressing those truths is difficult because they are beyond the power of language.

Moreover, something is or seems,
That touches me with mystic gleams,
Like glimpses of forgotten dreams —
Of something felt, like something here;
Of something done, I know not where;
Such as no language may declare.

Alfred Lord Tennyson, The Two Voices