You have two sets of eyes, the ones in your head and the ones in your heart. The eyes in your head see the outer world while the eyes of your heart can see God. However, the eyes of your heart can also focus on your outer world, which is not a good thing.
The obvious goal is to keep the eyes of your heart focused on God, who lives in you and is not separate from you. This is walking by faith, this is how you look not at the world but at the unseen, this is how you set your heart on things above, this is how you have great faith, and this is how you stay in perfect peace. The list goes on and on, I bet you can find several more.