Were the people of knowledge to protect knowledge and place it only before those who deserve it, they would be the leaders of the people of their time. However, they have spent it for the people of this world in order to gain some of their world, so they have become humiliated in the eyes of its people. I heard your Prophet (S) say, ‘Whoever makes all his concerns into one concern,  the concern of his Hereafter, Allah suffices him for his worldly concerns. Whoever is fully-occupied by his concerns regarding the situations of the world, Allah does not care in which of its valleys he perishes’.

—’Abdullah ibn Mas‘ūd [d. 32H]

(Read on pg 53, Imam Abu Baker Muhammad b. al-Husayn al-Ajurri, The Character of the Bearers and People of the Qur’an. Al-Quran Society. London:2002.)