A sound heart: Allaah تعالى says: ﴿إِلَّا مَنْ أَتَى اللَّـهَ | Ilm4all

A sound heart:
Allaah تعالى says:
﴿إِلَّا مَنْ أَتَى اللَّـهَ بِقَلْبٍ سَلِيمٍ﴾
{Except for the one who brings to Allaah a clean heart}
[Surah al-Shu`araa’ (26): 89]

1) Signs of a sick heart:
a ) does not feel pain for the sins it has committed
b ) persistently continues sinning
c ) thinks it is a simple matter

2) Signs of a clean heart:
a ) The heart which reminds you to seek Allaah's forgiveness
b ) blames you for your sins
c ) Is always worried about the consequences of the bad actions
d ) fears Allaah
e ) selfish with time and does not waste it
f ) when in prayer all the worries go away
g ) satisfied with the remembrance of Allaah
h ) does not get tired with the remembrance of Allaah and the recitation of the Qur'aan
i ) is always concerned with the purification of the deeds and not concerned with the amount of reward.
j ) is concerned with the quality of the deed and not the quantity