Mary of Bethany had the right idea...
From a great article on what it means to be a mystic (all emphasis mine) : What makes a mystic, well, “mystical”? Mystic and related words come from the Greek language — from the same word which gives us mystery and even sacraments. But the Greek root word, mueo, also gives us the English word mute. So a mystic is someone who enters the mystery of God. And a mystic also, and therefore, is someone whose spirituality is muted (in other words, profoundly silent) — which is to say it cannot even be put into words. It’s the silence of a monastery, understood not merely as the absence of sound (or thoughts, or words), but as an opening that allows us to discern the quiet presence of God. A mystic, in the broadest and m[o]st humble sense of the word, is simply someone whose relationship with God is primarily contemplative. Someone who prays, and who prays silently, opening the heart to the presence of God , which cannot ever be fully put into words. The author wisely...