Tis impossible to avail our selves of the genuine Powers of Eloquence, without examining in their Elements and first Principles, the Force and Harmony of Numbers, as employed by the Poets and orators of ancient and modern times, and without considering the natural Powers of Imagination, and the Disposition of Mankind to Metaphor and figure, which will require the Knowledge of the true Principles of Grammar, and Rhetoric, and of the best classical Authors.
Now to what higher object, to what greater Character, can any Mortal aspire, than to be possessed of all this Knowledge, well digested, and ready at Command, to assist the feeble and Friendless, to discountenance the haughty and lawless, to procure Redress of Wrongs, the Advancement of Right, to assert and maintain Liberty and Virtue, to discourage and abolish Tyranny and Vice?

What It Means

This is a placeholder explanation generated by the low-overhead model. It interprets "Tis impossible to avail our selves of the genuine Powers of Eloquence, without examining in their Elements and first Principles, the Force and Harmony of Numbers, as employed by the Poets and orators of ancient and modern times, and without considering the natural Powers of Imagination, and the Disposition of Mankind to Metaphor and figure, which will require the Knowledge of the true Principles of Grammar, and Rhetoric, and of the best classical Authors.
Now to what higher object, to what greater Character, can any Mortal aspire, than to be possessed of all this Knowledge, well digested, and ready at Command, to assist the feeble and Friendless, to discountenance the haughty and lawless, to procure Redress of Wrongs, the Advancement of Right, to assert and maintain Liberty and Virtue, to discourage and abolish Tyranny and Vice?" in the context of "Letter to Jonathan Sewall (October 1759)" to mean that wisdom is timeless.