My peace I give to you. Not as the world gives do I give to you. Let not your hearts be troubled, neither let them be afraid.
~ John 14:22
When a person is angry with another person, that person is removed from their heart. That's why the physical reaction is to shout. The greater the distance, the louder the shouting. But when individuals are in love, they speak softly, and when they are further in love, no words are needed.