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.
If you are in the dark, it does not mean that you have failed and that you have taken some terrible misstep. For many years I thought my questions and my doubt and my sense of God's absence were all signs of my lack of faith, but now I know this is the way the life of the spirit goes.