Sometimes when we are really hurting---be that physically or emotionally, all that we can think about is the pain that we are in.
It is sort of like when you are walking with a pebble in your shoe and every time that you walk, you feel the pain-----and sometimes that is all that you can think about. However, when the pebble gets removed, you can begin thinking about other things---like the world around you and what they are facing.
It is the same way when we are hurting--sometimes our own pain can make it difficult for us to give out to others and focus on them. But when God heals us and does His Work in our lives, we are able to be a reflection of His Light to the world.....
So sometimes maybe we need to check and see if there is a pebble in our shoe----whether that be literal or symbolic of something else going on under the surface.
To be emotionally healthy, having an understanding of what is truly going on inside us, seeing our identity in Christ and seeking to understand things from God's perspective, and dealing with what is going on by acknowledging it honestly are great steps to take.