Scott Russell Sanders said this quote

Saints and bodhisattvas may achieve what Christians call mystical union or Buddhists call satori--a perpetual awareness of the force at the heart of the heart of things. For these enlightened few, the world is always lit. For the rest of us, such clarity comes only fitfully, in sudden glimpses or slow revelations. Quakers refer to these insights as openings. When I first heard the term from a Friend who was counseling me about my resistance to the Vietnam War, I though of how on an overcast day, sunlight pours through a break in the clouds. After the clouds drift on, eclipsing the sun, the sun keeps shining behind the veil, and the memory of its light shines on in the mind.