“And He called the multitude, and said unto them, ‘Hear, and understand: Not that which goeth into the mouth defileth a man; but that which cometh out of the mouth, this defileth a man.’ Then came His disciples, and said unto Him, ‘Knowest Thou that the Pharisees were offended, after they heard this saying?’ But He answered and said, ‘Every plant, which My heavenly Father hath not planted, shall be rooted up. Let them alone: they be blind leaders of the blind. And if the blind lead the blind, both shall fall into the ditch.’ Then answered Peter and said unto Him, ‘Declare unto us this parable.’ And Jesus said, ‘Are ye also yet without understanding? Do not ye yet understand, that whatsoever entereth in at the mouth goeth into the belly, and is cast out into the draught? But those things which proceed out of the mouth come forth from the heart; and they defile the man. For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies: these are the things which defile a man: but to eat with unwashen hands defileth not a man.’” Matthew 15:10-20 (KJB)
Some thoughts from F. B. Meyer…
“It is good to study our Lord’s list of the sources of soul-pollution. Evil thoughts come first. We cannot prevent an evil suggestion being presented to our minds, but we can refuse to dwell on it. To resist the inclination to dwell on it strengthens us in the opposite direction; to yield to it is to commit the sin in our heart, which, in God’s sight, is equivalent to the outward act. Notice that railing, that is, unkind and uncharitable speech, is in this black-list.
The heart, rather than the body, is the source of sin. Out of the heart! The body is the dial-plate on which the soul registers its improvement or deterioration. Do not find fault with your members: look to your heart and keep it beyond keeping, for out of it are the issues of life. Ask God to create in you a clean heart. See that you distinguish between the first Adam and the second. Deny what you inherit of human weakness and sin, and affirm all that is of Christ’s imparting. The cross of Calvary and the uprising of the living Christ are facts of perpetual experience.” F. B. Meyer Through the Bible Day by Day on Mat. 15:10-20