Answer:
Siddhartha returned to an earlier stage of life when he decided not to go after his son, being alone again.
Explanation:
"Siddharta" is a book written by Hermann Hesse. This book is inspired by the teachings of Buddha Siddhartha Gautama and brings topics such as the human search for emotional control, the encounter of the spiritual dimension and stability of the human mind.
In the book Siddharta is a young man very wise and admired by people, but he feels unhappy because he cannot find spiritual fulfillment, he becomes a disciple of Buddha and learns that this fullness comes with the experiences and the way we deal with them. With that, he decides to follow his destiny and have his own experiences.
Over the years, and after a long time alone, Siddharta is presented with a son. However, father and son were never very close and his son decides to leave, which makes Siddharta very sad and spiritually agonized, but after reflecting he decides not to go after his son and regress to the previous stage of life.