Matthew 15:18 (KJV) 18 But those things which proceed out of the mouth come forth from the heart; and they defile the man.
Matters of the heart matters more than the physical. They affect us in more significant and more crucial ways.
The words we honestly speak spring from deep within us. Depending on the condition of our hearts, the kinds of words coming out reflect them. The Bible tells us, “The heart is deceitful above all things, and desperately wicked: who can know it?” (Jeremiah 17:9). That’s why although we hear it often, it’s not always wise to say “Just listen to your heart,” or “Just follow your heart.” Unregenerate hearts from unsaved world often come up with very wrong advice.
We praise God for changing our hearts. Instead of hearts of stone—hard hearts unwilling to listen to God’s Word and God’s Spirit, He gave us hearts of flesh—soft hearts—longingly, lovingly hungering, expectant of, and pursuing Him, His Kingdom, His Word, and His will. We’re more concerned about these hearts of ours and the issues flowing from them compared to the physical stuff we stuff our physical bodies with.
Don’t get me wrong; we don’t deny the importance of our physical bodies and the honor our Lord Jesus has bestowed on them. We are the temples of the precious Holy Spirit. We recognize and realize the importance of good diet and exercise. Over-eating is still something to avoid, although I admit, I need more discipline in that. Gluttony may be a more convicting term than over-eating.
We can desecrate this temple. But what defiles this temple are not the kinds of food we eat but the kinds of words coming out of our lips; the kinds of thoughts we think with our brains, and the kinds of actions we engage in with our bodies. Immorality—these kinds of acts of our bodies defile us. But all these ultimately spring from deep within us. We take care of our hearts; everything else flows from there. Our hearts belong to Him; that’s the big difference.