Who perceives his own
lifeDefinition of life: The amount of functioning organisms in the physical universe. Their typical properties are: energy and metabolism, organization, susceptibility, reproductive capacity, heredity and growth.
and that of his fellow
menDefinition of man: Homo sapiens sapiens. A higher mammal of the biological order of primates. Able to reason according to the label.
as meaningless, is not only unhappy, but hardly viable.