There is a longstanding tradition that God whispers in our ears. He does not shout. It is in --the holy whisper, -- writes the Quaker mystic, that we hear Abba's voice, not in the noise of clamoring crowds or the incessant barrage of social media. To hear the voice of God is an awesome thing--to know his thoughts, to intuit his love, to participate in his good pleasure. It is both a gift to be received and art to be cultivated. It can call to us when we least expect; but we can train ourselves to become receptive listeners. We need help to separate the cacophony of voices calling to us from...