Ibn Masʿūd (رضي الله عنه) said: "Allah has distributed your character traits among you just as He has allocated your provisions. And indeed, Allah gives wealth to those He loves and those He does not love — but He only grants īmān to those He loves. So, whoever clings to their wealth, refuses to spend it, fears the enemy, avoids striving against him, and dreads the night while failing to endure its hardships — then let them increase in saying: Lā ilāha illa Allāh, Subḥān Allāh, al-ḥamdu liLlāh, and Allāhu akbar."
Abū Masʿūd al-Anṣārī (رضي الله عنه) narrated that the Messenger of Allah (ﷺ) said: "Indeed, among the words which the people have attained from the first prophecy is: 'If you do not feel shame, then do as you wish.'"
{And recite to them the story of Adam's two sons, in truth, when they both offered a sacrifice to Allah, and it was accepted from one of them but was not accepted from the other. Said [the latter], 'I will surely kill you.' … And his soul permitted to him the murder of his brother, so he killed him and became among the losers.} — Al-Māʾidah: 27–31
Ibn al-Qayyim said: "None becomes accustomed to music except that his heart becomes hypocritical without his realizing it. Love for music and love for the Qur'an never coexist in a heart without one driving out the other. We have witnessed firsthand how the Qur'an weighs heavily upon the hearts of music-lovers — they remain unmoved, untouched, unstirred by any yearning. But when the Qur'an of Shayṭān — music — comes forth, how softened become their voices! How stilled and tranquil their hearts! If this is not hypocrisy, then it is its twin and very foundation."
Allah (ﷻ) said: {Did I not enjoin upon you, O children of Adam, that you not worship Satan — indeed, he is to you a clear enemy. And that you worship Me? This is a straight path.}
Ibn al-Qayyim: "This subtly alludes to the secret underlying the fact that shirk is considered the greatest of all sins in the sight of Allah. It is never forgiven except through repentance, entails eternal punishment in the Fire, and its prohibition stems not merely from Allah's command, but from the inconceivable nature of Allah legislating the worship of any deity besides Himself. How could it be imagined that the One who is alone in His Lordship, divinity, grandeur, and splendor would permit or be pleased with anyone sharing that with Him? Exalted is Allah far above that — a tremendous exaltation."
"Those innovators among the people of speculative theology — when they opened the door to corrupt analogical reasoning in matters of intellect and misguided interpretation in matters of revelation — they paved the way for heretical atheists to go far beyond this into sophistry and esotericism. Every further step down that path drew them into something more depraved, until the Qarāmiṭah nullified all known religious obligations. As their leader declared: 'We have lifted from you the burden of worship — there is no fasting, no prayer, no pilgrimage, and no zakāh.'"
Ibn al-Qayyim: "Tawḥīd and following one's desires are mutually opposed. Desire is a kind of idol, and every servant harbors an idol in their heart according to their desire. Allah sent His messengers to shatter idols and to call people to worship Him alone. The intent of Allah is not merely to break down carved idols while leaving intact the idols within the heart; rather, His intent is first to destroy the idols lodged in the heart."