List of major sins that have to do with one's inward attitude

1 - Associating others with Allah (Shirk)

2 - Minor Shirk (showing off)

3 - Hidden anger, grudges and envy

4 - Arrogance, self-admiration and showing off

5 - Deceit

6 - Hypocrisy

7 - Wronging others

8 - Turning away from people out of arrogance and scorning them

9 - Indulging in that which is of no benefit

10 - Greed

11 - Fear of poverty

12 - Being angry with the divine decree

13 - Looking at the rich and venerating them because of their richness

14 - Mocking the poor because of their poverty

15 - Stinginess

16 - Competing in worldly gains and showing off

17 - Adorning oneself for others with things with which it is forbidden to adorn oneself

18 - Compromising religious principles

19 - Loving to be praised for what one has not done

20 - Being reoccupied with the faults of others whilst ignoring one's own faults

21 - Forgetting blessings

22 - Strong feelings for religions other than the religion of Allah

23 - Not accepting the decree of Allah

24 - Not taking the rights and commands of Allah seriously

25 - Mocking the slaves of Allah, looking down on them and despising them

26 - Following whims and desires, and turning away from the truth

27 - Cheating and deceiving

28 - Desiring the life of this world

29 - Being stubborn in rejecting the truth

30 - Thinking badly of Muslims

31 - Not accepting the truth because it goes against one's own whims and desires, or hating those who speak the truth

32 - Rejoicing in sin

33 - Persisting in sin

34 - Loving to be praised for doing acts of worship

35 - Being content with the life of this world

36 - Forgetting Allah and the Hereafter

37 - Being angry when one is offended and avenging oneself even when one is in the wrong

38 -      Feeling safe from the plot of Allah by getting carried away in sin and relying on Allah's mercy

39 - Despairing of the mercy of Allah

40 - Thinking badly of Allah

41 - Despairing of the mercy of Allah

42 - Acquiring knowledge for worldly gain (showing off)

43 - Concealing knowledge

44 - No acting upon one's knowledge

45 - Showing off one's knowledge out of pride

46 - Undermining the position of the scholars and belittling them.

47 - Deliberately telling lies about Allah

48 - Deliberately telling lies about the Messenger of Allah (Peace and Blessing upon Him)

49 - Introducing bad ways

50 - Abandoning the Sunnah

51 - Not believing in the divine decree

52 - Not fulfilling promises

53 - Loving wrongdoing or evildoing

54 - Hating the righteous

55 - Offending the close friends of Allah and taking them as enemies

56 - Cursing time

57 - Saying a word that could cause a great deal of mischief and harm

58 - Being ungrateful for blessings

59 - Showing evil behaviour and foul language so as to make people fear you and avoid your evil