True misguidance is that you approve now what you used to repudiate before (because it was wrong) and repudiate now what you used to approve before; and be aware of changing colours in the religion, for the religion of Allāh is one.
Ibn Baṭṭah, Al-Ibānatu Al-Kubrā ḥadīth 25, and others.
Learn what is not to be taken, like you learn what is to be taken.
Ibn ʿAbd Al-Barr, Jāmiʿu Bayyān Al-ʿIlm article 435.
Knowledge only comes from learning, and forbearance comes from trying to be forbearing, and whoever seeks what is good will be given it, and whoever avoids evil will be protected from it.
Abū Khaythumah, Kitāb Al-ʿIlm (Albānī edition) ḥadīth 114. Al-Albānī grades its chain of transmission ṣaḥīḥ, and states it has been reported from the Prophet ﷺ. See Al-Ṣaḥīḥah 342.
There are three types of men and three types of women. As for the women, then [one] is the chaste, Muslim, gentle, loving and childbearing woman. She helps her family in difficult situations and does not help situations to overcome her family. Rarely will you find such women. Another is a vessel, she does nothing more than bear children. The third type is a shackle, Allāh puts her around the neck of whomever he wills, and when he wills to remove it, he removes it. Men are [also] three kinds. [The first is] a chaste, easy, gentle man who possesses opinion (insight) and is worthy of being consulted; and when a matter befalls him, he follows his insight, and approaches matters as they should be. [The second is] a man who has no opinions of his own, and when a matter befalls him he goes to the one who does have insight and should be consulted, and he adopts his opinion on the matter. The third is a man who is confused, lost and aimless; he neither follows (seeks) guidance, nor obeys any guide.
Al-Bayhaqī, Shuʿab Al-Īmān 10:39 ḥadīth 7131.
Verily the Qurān guides you to your disease and your treatment: as for your disease, it is your sins; and as for your treatment, it is to seek the forgiveness of Allāh.
Al-Bayhaqī, Shuʿab Al-Īmān 9:347 no. 6745.
A man remains upon good as long as he knows what things spoil his deeds.
Aḥmad b. Ḥanbal, Al-Zuhd p339.
There are two blessings I have been blessed with, I know not which of them is greatest: that Allāh guided me to Islām, and that he did not make me a Ḥarūrī (from the Khawārij extremists).
ʿAbd Al-Razzāq Al-Ṣanʿānī, Al-Muṣannaf ḥadīth 18667.
Whoever does not take exhortation [and is not effected] by three things, will not be exhorted by anything: Islām, the Qurān and old age (graying).
Ibn Abī Al-Dunyā, Al-ʿUmr Wa Al-Shayb #40
There is no good in this life except for one of two men: a man listening carefully, receiving and holding [knowledge]; or someone knowledgeable speaking.
Ibn Ḥibbān, Rawḍatu Al-ʿUqalāʾ 1:42.
Men are of four types: There is the man who knows and he knows that he knows. He is knowledgeable, so follow him and ask him. And there is the man who does not know, and he knows that he does not know. He is ignorant, so teach him. And there is the man who knows, but he does not know that he knows. He is heedless, so remind him. And then there is the man who does not know, but he does not know that he does not know (he thinks he knows). This is the fool (idiot), so beware of him.
Ibn ˁAbd Al-Barr, Jāmiˁ Bayān Al-ˁilm wa Faḍlihī article 1538.