If we wish to be successful on the Day of Judgement, then in this world we must develop a sound heart (qalb salīm).
Allah has informed us: …The Day when neither wealth nor children will be of any benefit. Only those who come before Allah with a pure heart (will be saved)” (26:88-9).
In order to achieve a sound heart, we must:
Purify our hearts from its ‘diseases’ and evil characteristics, such as shirk, showing off (riyā’), envy, hatred, pride, greed, heedlessness, hypocrisy, and the love of the world and leadership.
Beautify our hearts with the ‘actions’ of the heart and praiseworthy characteristics. These include: firm belief (īmān), knowledge of Allah (maʿrifah), sincerity (ikhlāṣ), piety and mindfulness (taqwā), trust in Allah (tawakkul), hope (rajā’), fear (khawf), gratitude (shukr), patience (ṣabr), love (ḥubb), yearning for Allah (shawq) and certainty (yaqīn), and excellent character when dealing with the creation of Allah, such as kindness, mercy, love, forgiveness, generosity, humility etc. Taken from here
Occupying yourself with purifying your heart is better than an abundance of prayer and fasting whilst your heart is corrupt. Ibn Rajab
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