“I do not know what anything is for.”
You feel responsible for your presence here and have, mistakenly, concluded that the reason for that must be that you created yourself. And since you obviously did not create all that you perceive in your environment, you stand separated and alone. You find yourself looking at everything, rather than with everything. And that is why you do not really know what anything is for. Let’s look at the distinction between at and with a little closer.
Your imagined separated position induces a state of mind that is constantly trying to justify itself. This state of mind looks at the outside world and assesses it in terms of how useful a given person, thing or situation is in light of your need to justify your existence. That explains the word at in: … looking at everything, and judging it.
But you do not have to justify your existence at all. God created you together with everything else. You are part of a whole that the senses will register as this and as that. However, it is all one. That explains the word with in: … looking with everything.
From the perspective of the living whole, everything serves the purpose of the well-being of the whole’s. Since you are (part of) the living whole, everything serves you. That is why the lesson says: “Everything is for your own best interests.”
Your sense of identity, and thus your agenda, determines whether you judge everything or accept everything.