At a certain pitch of religious experience, the heart just wants to sing; it breaks into song. Paradoxically, you could say when silence finds its fullness, it comes to word. As the Book of Wisdom says, "When night in its swift course had reached its halfway point and deep silence embraced everything" -- when night was at its darkest and deepest -- there "the eternal Word leaped from the Heavenly throne": silence burst into song.
Then there is the listening at the gates of the heart which has been closed for so long, and waiting for that mysterious inner voice to speak. When we hear it, we know it is the Truth to which we must now surrender our lives.