In this latter part of life, my prayer of the heart is most often without words. My tongue is stilled. My mind is stilled. The prayer of the heart becomes the heart's own respiration. I breathe in and I breathe out. It is God's breath. God breathing in, God breathing out. It is God's breath breathing me.
In the crucible of silence you will learn holiness, since silence is the door to humility, contemplation and mercy.