What we do know is that great injustice, cruelty, physical pain, or betrayal, when consciously accepted and generously borne, can give rise to a peculiarly luminous and healing quality of love, and that this love radiates out from the site of the pain as a source of healing and hope for the entire cosmos.
God is the friend of silence. See how nature -- trees, flowers, grass -- grow in silence; see the stars, the moon, the sun, how they move in silence... The more we receive in silent prayer, the more we can give in our active life. We need silence to be able to touch souls. The essential thing is not what we say, but what God says to us and through us. All our words will be useless unless they come from within.