Silence is the perfectest herald of joy: I were but little happy, if I could say how much. Lady, as you are mine, I am yours: I give away myself for you and dote upon the exchange.
In silence a question has great power, because in silence a question will always lead you deeper into your experience. If there is no grounding in silence, a spiritual question is going to lead you into your mind.
If we look at the world around us, we see that we are conditioned to not listen deeply. Because isn't that what silence is? It's a listening, a deep wordless listening.