" Uchiyama Roshi says that modern people in developed countries who enjoy convenient lives without personal effort are like these heavenly beings. People at the top especially enjoy their lives. However, everything is impermanent. When they lose status, they experience much suffering, just like the heavenly beings of ancient Buddhist cosmology. Heaven is a manmade idea of what’s “better.” When we feel more successful than others, we’re in heaven. When we feel others are more successful, we’re in hell. To leave this way of life based on comparison is to free ourselves from samsara. Living on the ground of the true reality of life is finding nirvana within this world. "

― Kosho Uchiyama , The Zen Teaching of Homeless Kodo