The intentions of the heart, the thoughts and decisions of the soul, sooner or later, are expressed with attitudes and behaviors; perhaps, the true disposition is hidden behind manipulative forms and fraudulent behaviors, but at the least expected moment or with the slightest setback, the darkest and most secret desires, conceptions and considerations are manifested.

Someone said: "speak to me and I will tell you who you are".

Proverbs 23:7 NKJV

7 For as he thinks in his heart, so is he.
“Eat and drink!” he says to you,
But his heart is not with you.

Matthew 12:34-35 NKJV

34 ... For out of the abundance of the heart the mouth speaks. 35 A good man out of the good treasure of his heart brings forth good things, and an evil man out of the evil treasure brings forth evil things.

Matthew 15:18-19 NKJV

18 But those things which proceed out of the mouth come from the heart, and they defile a man. 19 For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies.

1 Corinthians 4:5 NKJV

5 Therefore judge nothing before the time, until the Lord comes, who will both bring to light the hidden things of darkness and reveal the counsels of the hearts. Then each one’s praise will come from God.