As a young man he was sheltered from the harsh realities of life, until one day he saw a sick man, then an aged blind man, and finally a body being carried to burial.
He saw a man who had lost his sight. 
mnli hypothesis: He saw a man who had lost his sight.  premise: As a young man he was sheltered from the harsh realities of life, until one day he saw a sick man, then an aged blind man, and finally a body being carried to burial.