What did Siddhartha see that led him to renounce the world?

Siddhartha saw the four sights—an old person, a sick person, a corpse and an ascetic—which led him to renounce the world. The encounters revealed aging, illness and death, while the ascetic suggested that liberation might be possible.

In the traditional biography, Siddhartha had been protected from unpleasant realities inside his father’s palace. During excursions outside, his charioteer Channa explained that old age, sickness and death were universal conditions, not exceptions affecting only strangers. The fourth sight, a wandering renunciant, gave Siddhartha a model for seeking answers beyond palace luxury.

These experiences produced a sense of spiritual urgency called saṃvega. Siddhartha eventually undertook the Great Departure, leaving his household life and beginning years of study and ascetic practice. After rejecting extreme self-mortification, he discovered the Middle Way and attained enlightenment at Bodh Gaya.

The story is an important traditional teaching narrative, but it is not presented in exactly this form in the earliest Buddhist texts. Early accounts describe Siddhartha reflecting on suffering more abstractly; the four-sight episode was developed in later biographies.