A little later when the disciples were alone with
Jesus, Peter asked about what He had said.

Jesus remarked of his lack of understanding,
but then explained that the food one eats cannot
affect the man's spiritual being one way or the
other. But, what comes from the heart, "evil
thoughts, adulteries, fornications, murders,
thefts, covetousness, wickedness, deceit,
lasciviousnes, an evil eye, blasphemy, pride,
foolishness: these. . . things. . .defile a man."