“The Lamp of the Body”
In one section of his Sermon on the Mount, Jesus refers to the opposite of double-mindedness, though he uses a different metaphor. In Matthew 6:22 he says, “The eye is the lamp of the body. So, if your eye is healthy, your whole body will be full of light.”
The Eye Is the Mind
The “eye” in this verse is not the origin of light but rather the window through which light enters one’s “body” (or life). It corresponds to the “heart” (or mind) in the preceding verse (Matthew 6:21). There, Jesus indicates that the main focus of our thoughts and actions in this earthly life, the desire of our “heart,” should be to “store up … treasures in heaven” (Matthew 6:20, NASB).
A “Healthy” Versus “Bad” Mind
If our mind’s focus is on heaven and is “healthy,” it will allow the light of the word of God to penetrate, and every aspect of our lives will be benefited by it. If our mind is “bad” (or diseased), every facet of our lives will suffer. The lenses of eyes that have become progressively opaque, a medical condition known as “cataracts,” don’t permit light to penetrate. Likewise, a sick mind given over to selfishness, greed, and other forms of sin does not allow the light of God’s word to enter in.
Able to Focus Primarily on One Thing
The word “healthy” in Matthew 6:22 (ESV) can be translated “single” and is “used of the eye as not seeing double” (The Complete WordStudy Dictionary). The greedy, religious man tries to focus on both “God and wealth,” which, according to Jesus, can’t be done (Matthew 6:24). In contrast, the one whose vision is “single” focuses primarily on God and uses his possessions to serve him and others.
The mind of those whose eye is “clear” (Matthew 6:22, NASB) sees things correctly; they know the way and don’t stumble. They focus on “the city that has foundations, whose designer and builder is God” (Hebrews 11:10,26). They confess that they are pilgrims here on the earth (Hebrews 11:13) and, thus, are able to fix their eyes on what really matters and make it their priority (Ecclesiastes 12:13).
You too can have a beautiful mind. Why not make God and his word your primary focus in life?