Sins of the Heart

Among the sins of the heart are:

1. Insincerity in performing good deeds [riya'] i.e. doing good deeds for the sake of the people to earn their praise, thus nullifying their reward
2. Priding oneself in obeying Allah ['ujb] i.e. forgetting the grace of Allah and deeming one’s worship was by one’s own ability
3. Havings doubts in Allah
4. Feeling safe from the punishment of Allah
5. Despairing of Allah’s mercy
6. Having arrogance towards the slaves of Allah [kibr]
7. Having enmity in the heart for a Muslim
8. Being envious i.e. to hate and feel bitter about the endowment on a Muslim and act in accordance with this feeling
9. Reminding a person of the charity given to him with the purpose of breaking his heart i.e. To utter words such as, ”Did I not give you a so-and-so on such and such a day?” This nullifies the reward
10. Persisting on sinning
11. Believing that Allah shall not forgive him
12. Thinking ill of Muslims
13. Denying the qadar
14. Being happy with a sin done by oneself or others
15. Betraying someone, even a blasphemer, such as to kill him after promising him safety
16. Harming a Muslim deceptively
17. Hating the Companions [ashab], the family of the Prophet [ahlu-l bayt], and the righteous Muslims [salihin]
18. Being a miser in paying what Allah made obligatory [bukhl]
19. Abstaining from paying what Allah made obligatory [shuhh]
20. Having a strong desire to be rich in a bad, sinful manner [hirs]
21. Breaching the rules of glorification regarding the things Allah made glorified [istihanah]
22. Belittling what Allah rendered great, as in status and consequence, be it obedience, disobedience, the Qur’an, Islamic knowledge, Paradise, or Hellfire

And Allah and His Messenger know best!