“A learned person among ignorant people, is like a live person among the dead.”
Shaykh al-Mufīd, Al-Amali, p. 40
Regarding Knowledge & Wisdom, General
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Ja'far al-Sadiq 30
Muslim religious person 702–765Related quotes
Source: The True Game, The Song of Mavin Manyshaped (1985), Chapter 2 (p. 31)

“A single day among the learned lasts longer than the longest life of the ignorant.”
As quoted in Epistulae morales ad Lucilium by Seneca, Epistle LXXVIII (trans. R. M. Gummere)

Source: The Courage to Create (1975), Ch. 1 : The Courage to Create, p. 13
Context: Courage is not a virtue of value among other personal values like love or fidelity. It is the foundation that underlies and gives reality to all other virtues and personal values. Without courage our love pales into mere dependency. Without courage our fidelity becomes conformism.

Source: The History of Rasselas, Prince of Abissinia (1759), Chapter 31
Context: “That the dead are seen no more,” said Imlac, “I will not undertake to maintain against the concurrent and unvaried testimony of all ages and of all nations. There is no people, rude or learned, among whom apparitions of the dead are not related and believed. This opinion, which perhaps prevails as far as human nature is diffused, could become universal only by its truth: those that never heard of one another would not have agreed in a tale which nothing but experience can make credible. That it is doubted by single cavillers can very little weaken the general evidence, and some who deny it with their tongues confess it by their fears.
“Yet I do not mean to add new terrors to those which have already seized upon Pekuah. There can be no reason why spectres should haunt the Pyramid more than other places, or why they should have power or will to hurt innocence and purity. Our entrance is no violation of their privileges: we can take nothing from them; how, then, can we offend them?”