The heart becomes sick, as the body becomes sick, and its remedy is al-Tawbah (repentance) and protection [from transgression]. It becomes rusty as a mirror becomes rusty, and its clarity is obtained by remembrance. It becomes naked as the body becomes naked, and its beautification is al-Taqwa. It becomes hungry and thirsty as the body becomes hungry, and its food and drink are knowledge, love, dependence, repentance and servitude.

A true believer does not fear physical death, rather he fears the death of his heart

One of the most beneficial of remedies is persisting in du’a.

The keys to the life of the heart lie in reflecting upon the Quran, being humble before Allah in secret, and leaving sins.

Ibn Taymiyyah lived poorly. He was imprisoned and threatened. But I have never seen anyone as happy as him.

Happiness is attained by three things: being patient when tested, being thankful when receiving a blessing, and being repentant upon sinning.

Whoever mocks his brother for a sin they repented from will not die till he himself falls into the same sin.