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dislike the idea of sharing it with others; these will occupy the first depth in Hell.
There are others who are in the habit of regarding their knowledge as equivalent
to power and position; and if they are ever contradicted or slighted they become
infuriated; these will occupy the second depth in Hell. Others confine their
knowledge to the circles of nobility and wealth and deem the poor classes
unworthy of it; these will occupy the third depth in Hell. Others appoint
themselves judges and hand down faulty opinions; these will occupy the fourth
depth in Hell. Other learned men employ in their discourses Jewish and Christian
argument in order to make their erudition seem great; these will occupy the fifth
depth in Hell. Others regard their knowledge as something virtuous and
honorable and continually dwell on it before men; these will occupy the sixth
depth in Hell. And finally there are the learned who are the victims of vanity and
conceit. Whenever they preach they upbraid, and whenever they are
admonished they show resentment; these will occupy the seventh depth in Hell.

It has been related that Yahya ibn Yazid al Nawfali once wrote to Malik ibn
Anas saying:

“In the Name of Allah, the Merciful, the Most Merciful.