There is no captive in a worse state than the one who is captivated by his worst enemy (Shaytan) and there is no prison which is tighter than the prison of hawa (desire) and there is no bond/fetter more strong than the bond of desire. How, then, will a heart which is captivated, imprisoned and fettered travel unto Allah and the Home of the Hereafter?
Ibn Qayyim Al-JawziyyaThere are no means of attaining faith and certainty except through the Qur'an.
Ibn Qayyim Al-JawziyyaThere is no joy for the one who does not bear sadness, there is no sweetness for the one who does not have patience, there is no delight for the one who does not suffer, and there is no relaxation for the one who does not endure fatigue.
Ibn Qayyim Al-JawziyyaA tear that runs down a believer's cheek is more beneficial than a thousand raindrops on the earth
Ibn Qayyim Al-Jawziyya