Charles Spurgeon Commentary Matthew 15:18-21

"But the things which proceed out of the mouth come forth out of the heart; and they defile the man. For out of the heart come forth evil thoughts, murders, adulteries, fornications, thefts, false witness, railings: these are the things which defile the man; but to eat with unwashen hands defileth not the man. And Jesus went out thence, and withdrew into the parts of Tyre and Sidon." — Matthew 15:18-21 (ASV)

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. Then Jesus went thence, and departed into the coasts of Tyre and Sidon.

He went right away, not because he was afraid to speak the truth, but because, having done so, he did not care to remain in the company of those who were around him. He would rather go even to the borders of pagan lands than live in the midst of Pharisaic hypocrisy: Jesus went thence, and departed into the coasts of Tyre and Sidon.