I think we must quote whenever we feel that the allusion is interesting or helpful or amusing.
“Happy and fortunate indeed would this nation be, nay, completely blessed, if it had good prelates and pastors, and but one prince, and that prince a good one.”
“Seek not the favor of the multitude; it is seldom got by honest and lawful means. But seek the testimony of few; and number not voices, but weigh them.”