Why did Prince Siddhartha Gautama leave the palace to live in the wilderness for 6 years?

When Siddhartha was a boy ... for the first time he saw a weak, unhealthy, elderly man and this word Siddhartha had never seen ... He went out into the world to find the meaning of life ... He wanted to live like other people ... During his 6 years he nearly starved to death, cut himself to death, until he found a tree. Under that tree he meditated until he reached Nirvana, which is the most peaceful state ... And then he went back to tell people his 8 fold path and 4 noble truths