The tilled earth reveals a worm which then the worm is eaten by a bird. Siddhartha realizes at this point that everything is connected and every action has a consequence. This is showing him maturing.
When the king notices Siddhartha interest in the world around him, he decides to again subdue Siddhartha from the world. The king tries to create a perfect and seductive life within the palace walls. Later when Siddhartha is sixteen his father finds him a bride and he is married. Not content, Siddhartha begs his father to leave the palace. His father allows this, but again tries to create an unrealistic world outside of the palace, by trying to get rid of all the suffering that surrounded it. Here is when Siddhartha begins his journey/adventure and show more maturing.
He sets out to the country with a guide and the further out he goes the more suffering he sees. As predicted by the fortuneteller, he sees 4