Hello, the point in the passages of Luke 11:37–44 is at verse 39:
Luke 11:39
Names of God Bible
39 The Lord said to him, “You Pharisees clean the outside of cups and dishes. But inside you are full of greed and evil.
The point of this passage is explained well in the Bible the cup refers to that person his own thoughts, actions, and feelings. What information can help us clearly understand how our own actions, feelings, and thoughts can be a real hinderance to our spiritual pursuits?
Proverbs 26:18-28
Living Bible
18-19 A man who is caught lying to his neighbor and says, “I was just fooling,” is like a madman throwing around firebrands, arrows, and death!
20 Fire goes out for lack of fuel, and tensions disappear when gossip stops.
21 A quarrelsome man starts fights as easily as a match sets fire to paper.
22 Gossip is a dainty morsel eaten with great relish.
23 Pretty words may hide a wicked heart, just as a pretty glaze covers a common clay pot.
24-26 A man with hate in his heart may sound pleasant enough, but don’t believe him; for he is cursing you in his heart. Though he pretends to be so kind, his hatred will finally come to light for all to see.
27 The man who sets a trap for others will get caught in it himself. Roll a boulder down on someone, and it will roll back and crush you.
28 Flattery is a form of hatred and wounds cruelly.
Jeremiah 4:11-16
Living Bible
11-12 At that time he will send a burning wind from the desert upon them—not in little gusts but in a roaring blast—and he will pronounce their doom. 13 The enemy shall roll down upon us like a storm wind; his chariots are like a whirlwind; his steeds are swifter than eagles. Woe, woe upon us, for we are doomed.
14 O Jerusalem, cleanse your hearts while there is time. You can yet be saved by casting out your evil thoughts. 15 From Dan and from Mount Ephraim your doom has been announced. 16 Warn the other nations that the enemy is coming from a distant land, and they shout against Jerusalem and the cities of Judah.
Titus 1:13-16
Living Bible
13 And this is true. So speak to the Christians there as sternly as necessary to make them strong in the faith 14 and to stop them from listening to Jewish folk tales and the demands of men who have turned their backs on the truth.
15 A person who is pure of heart sees goodness and purity in everything; but a person whose own heart is evil and untrusting finds evil in everything, for his dirty mind and rebellious heart color all he sees and hears. 16 Such persons claim they know God, but from seeing the way they act, one knows they don’t. They are rotten and disobedient, worthless so far as doing anything good is concerned.