Look and Listen to the Heart

A Verse:

“But the Lord said unto Samuel, Look not on his countenance, or on the height of his stature; because I have refused him: for the Lord seeth not as man seeth; for man looketh on the outward appearance, but the Lord looketh on the heart.” (1 Samuel 16: 7)

What are our hearts 💕 filled of?

Is it “His Words” being treasured there or ‘our own words of disobedience against His Word’.

How do we know that “words in our heart reveal the true us”? Another verse below:

“The good man out of the good treasure of his heart brings forth what is good; and the evil man out of the evil treasure brings forth what is evil; for his mouth speaks from that which fills his heart.” (Luke 6:45)

P/S:
This is the nature of the heart without God’s Word or Intervention upon it (when directed by a man’s own will):

“The heart is more deceitful than all else And is desperately sick; Who can understand it?” (Jeremiah 17:9)