4 Bible Verses about Defilement, Objects Of

However, not every person knows this [truth]. For some people have been so used to an idol all this time that they still think of the idol [as a reality] when eating food that has been sacrificed to it. And their weak conscience becomes polluted. [Note: These people cannot seem to shake off the idea that somehow the idol is real, so feel guilty of wrongdoing when eating food sacrificed to it].

Look carefully [at how you are living] so that no one falls away from God's unearned favor, and that no "poisonous plant sprouts up" to cause trouble and corrupt many people [Note: This is an analogy from Deut. 29:16-18 being used as a warning against the evil influence of wicked people],

In the same way, these people have dreams of committing physically corruptive practices; they reject authority over them [i.e., by both God and men], and speak against glorious [i.e., heavenly] beings.

They had observed some of His disciples eating their food with contaminated, that is, [ceremonially] unwashed hands.