The Dalai Lama was saying that when one is thinking about others with kindness and compassion, one is never lonely. Openheartedness—warmheartedness—is the antidote to loneliness. It has often amazed me that one day I can walk down the street feeling judgmental and critical of others, and I will feel separate and lonely, and the next day I can walk down the same street with more openhearted acceptance and compassion and suddenly everyone seems warm and friendly. It is almost as if my inner state of mind and heart changes the physical and social world around me completely.
The Book of Joy: Lasting Happiness in a Changing World
Dalai Lama, Desmond Tutu, and Douglas Carlton Abrams