In the next moment, he saw a crying patient. 
Next, he saw a dead body which was taken to the grave yard.
In the next moment Siddhartha Gautama sees a nun on his way.
Finally Prince Siddhartha concluded that misery is all arround. He thinks to find a solution for way to come out of misery. Then he desided to leave the royal life and also desided to go to forest. he looks at his wife and son before leaving the palace.
At the midnight, Prince Siddhartha and the charioteer Channa ride the horse Kanthaka, leave the city of Kapilvastu, cross the Anoma river and start a homeless life. At that time he was aged by 30 years old.
After he leftout from the Palace, during six years he first practiced various systems of meditation taught by two leading ascetics of the time. He felt that here he had not found any real answer to the problem of human suffering. He started to torture his body him self by blocking breath for lang time, not taking food and so on.
