There are no means of attaining faith and certainty except through the Qur'an.
Ibn Qayyim Al-JawziyyaThere 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-JawziyyaHow strange! You lose a little from you and you cry. And your whole life is wasting and you're laughing
Ibn Qayyim Al-Jawziyya