What is sin of the heart?

The Bible mentions several concepts related to the sin of the heart or sins within the heart. Here are some key passages that discuss this topic:

Jeremiah 17:9

"The heart is deceitful above all things,

And desperately wicked;

Who can know it?"

Matthew 15:18-20

"But those things which proceed out of the mouth come from the heart, and those things defile a man. For out of the heart proceed evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies. These are the things that defile a man; but to eat with unwashed hands does not defile a man."

Proverbs 4:23

"Keep your heart with all diligence,

For out of it spring the issues of life."

Romans 2:14-15

"For when Gentiles, who do not have the law, by nature do the things contained in the law, these, although not having the law, are a law to themselves, who show the work of the law written in their hearts, their conscience also bearing witness, and between themselves their thoughts accusing or else excusing them)"

Based on these passages, some examples of sins of the heart include:

- Deceitfulness and wickedness of the heart (Jeremiah 17:9)

- Evil thoughts, murders, adulteries, fornications, thefts, false witness, blasphemies (Matthew 15:18-20)

- Impure thoughts and desires

- Pride, arrogance, and self-righteousness

- Greed and covetousness

- Hatred, bitterness, and unforgiveness

- Jealousy, envy, and malice

- Doubt, unbelief, and lack of faith

The Bible emphasizes the importance of guarding the heart and keeping it pure. It is believed that the state of the heart ultimately determines the actions and choices of an individual.

Please note that these are just a few examples, and the sins of the heart can manifest in various forms. The Bible encourages believers to seek God's help in cleansing and transforming their hearts through prayer, repentance, and the renewing work of the Holy Spirit.