Tractatus Logico-Philosophicus proposition 4.1212

"What can be shown, cannot be said" [Was gezeigt werden kann, kann nicht gesagt werden].

And what "shows" itself es ist das Mystiche [is what we mean by "the mystical," T L-P prop. 6.522].

The "showing" [gezeigt] may be experienced as a "shining" [scheinen]. Hence the Pragmatist's need to abandon the "reality/appearance distinction".