Answer: A person has to discover that the world was created for him, that everything in him and around him, and that all the attributes and the actions he sees are aimed at and lead to the correction of his soul, but it’s only if he uses all this correctly and there is nothing else.
Everyone is facing the world of Ein Sof (Infinity), but he perceives this Ein Sof as the picture of this world. If he attributes all the states to the world of Ein Sof according to the principle of “There is none else besides Him,” “the good and the benevolent,” and if he gathers all the times into one point, realizing that they all refer to one idea and that they all lead to one root that returns us to one goal, then he will be able to say openly that the whole world was created only for him.
Everyone should do that: Everyone has his own world since he discovers the world in his desire; he discovers that everything else is his own mental strength and he is the only one who has freewill. Now it seems that there are other forces in the world beside him, but this is only because he hasn’t reached the recognition and the decision that the whole world is inside him, depicted in him and is meant for him, so that he will be able to reveal the general unity.
From the 1st part of the Daily Kabbalah Lesson 2/20/13, Writings of Baal HaSulam