However, they also happened upon a feeble old man who was lying at the side of the road.
As this was different from anything Siddhartha had ever seen before, he asked someone to explain what was wrong with the man. It was only then that Siddhartha learned about how people get old.
Siddhartha was very moved by the suffering of the old man. He journeyed out into the city three more times and saw a sick man, a dead man and a sage. These visits led to his realising the fundamental truths of life.