In Spiritual Genius, journalist Winifred Gallagher, the acclaimed author of Working on God, asks Rabbi Lawrence Kushner to define holiness. "Standing in the presence of God," he says. "Everyone has it, but some people seem to have more of a knack for accessing it." Like holiness, the gift that Gallagher calls "spiritual genius"--which she defines as "the uniquely human ability to search for and find life's meaning, then express it in...