And seek help in patience and As-Salât (the prayer) and truly it is extremely heavy and hard except for Al-Khâshi'ûn [i.e. thetrue believers in Allâh - those who obey Allâh with full submission, fear much from His Punishment, and believe in His Promise(Paradise, etc.) and in His Warnings (Hell, etc.)]. [Surah Baqarah 2:45]
~^~>~Whoever desires to purify his heart, then let him prefer Allahto his desires~<~~^~Ibn Al Qayyim