Your soul is your mind, will, and emotions. What you take in with your eyes affects your soul realm. It is like a window pane, if it is colored, you see everything tinted with that color. If you are looking out of a dingy glass, the whole world looks dingy. Have you ever looked into one of those distorted mirrors where everything looked out of whack? If the glass is distorted the whole world looks distorted.
The Bible says in Matthew 6:22-23 that the eye is the lamp of the body. Jesus is saying that the eye is the gateway to light for the entire body.
How well or sound the eye is doesn't just affect the eye,
it affects ALL of your body and how well you are able to function in life.
Since the scripture immediately before this talks about Jesus speaking about what we treasure and set our hearts on, it makes sense to see that an eye being healthy or sound has to do with what we have decided to treasure, we "set our eyes" on what we truly treasure. So how do you know where your treasure is?
Where do you spend your time?
Where are your priorities?
Asking these questions will help you locate yourself as to where your treasure is.
The Bible says in vs. 24 that no one can serve two masters. You cannot, Jesus is saying, have two things vying for first place in your life, as the focus of your eye. Doing this will make you a divided person, unable to be whole in the relationships and activities of your life. Attempting to serve two masters will result in your coming to resent, despise, and resist one or the other. Your whole life will be filled with darkness, not just your eyes.
So, what is the answer to our eyes being healthy?
The person who has a sound eye is the person who puts God first place in their life, then this sheds light on everything else in their life, their relationships, their work, and their wealth. Psalm 119 vs 5 - Your Word is a lamp unto my feet and a light unto my path...