...When your eye is good (simple), your whole body also is full of light. But when your eye is bad, your body also is full of darkness." (Luke 11:34)
The eye is the lamp of the body. "If your eyes were simple, you'd be full of light." Simple is to be open... the things things of God are very simple, many times it's us who complicate things. If the way you see things is complicated so also your life will be filled with darkness and consequently you'll be living without the light that comes from God. Do you want more of God? Do you want to have an encounter with Him? Do you want to be filled with light?
Look at your life in a simple way, of someone who is preparing for the Kingdom of God. My life would be very difficult if I continued worrying about what people said about me, of being this or that and worrying with things that are yet to come and etc. It's no use to stress about all that, and lose my opportunity of entering the Kingdom of God (thank God I was able to wake up and see things with simple eyes). Simplicity makes you a blessed person of God that's understanding, confident, compassionate, patient, and makes you look at things through God's eyes.
God is in the simple things and the complicated ones don't seem to understand that.