now one,
who, when I question him what he knows, he presently calls for a book to
shew me, and dares not venture to tell me so much, as that he has piles
in his posteriors, till first he has consulted his dictionary, what piles
and what posteriors are.

We take other men's knowledge and opinions upon trust; which is an idle
and superficial learning. We must make it our own. We are in this very
like him, who having need of fire, went to a neighbour's house to fetch
it, and finding a very good one there, sat down to warm himself without
remembering to carry any with him home.--[Plutarch, How a Man should
Listen.]--What good does it do us to have the stomach full of meat, if
it do not digest, if it be not incorporated with us, if it does not
nourish and support us? Can we imagine that Lucullus, whom letters,
without any manner of experience, made so great a captain, learned to be
so after this perfunctory manner?--[Cicero, Acad., ii. I.]--We suffer
ourselves to lean and rely so strongly upon the arm of another, that we
destroy our own strength and vigour. Would I fortify myself against the
fear of death, it must be at the expense of Seneca: would I extract
consolation for myself or my friend, I borrow it from Cicero. I might
have found it in myself, had I been trained to make use of my own reason.
I do not like this relative and mendicant understanding; for though we
could become learned by other men's learning, a man can never be wise but
by his own wisdom:

["I hate the wise man, who in his own concern is not wise."
--Euripides, ap. Cicero, Ep. Fam., xiii. 15.]

Whence Ennius:

"Nequidquam sapere sapientem, qui ipse sibi prodesse non quiret."

["That wise man knows nothing, who cannot profit himself by his
wisdom."--Cicero, De Offic., iii. 15.]

"Si cupidus, si
Vanus, et Euganea quantumvis mollior agna."

["If he be grasping, or a boaster, and something softer than an
Euganean lamb."--Juvenal, Sat., viii. 14.]

"Non enim paranda nobis solum, sed fruenda sapientia est."

["For wisdom is not only to be acquired, but to be utilised."
--Cicero, De Finib., i. I.]

Dionysius--[It was not Dionysius, but Diogenes the cynic. Diogenes
Laertius, vi. 27.]--laughed at the grammarians, who set themselves to
inquire into the miseries of Ulysses, and were ignorant of their own;
at musicians, who were so exact in tuning their i