Knowledge is two-fold, and consists not only in an affirmation of what is true, but in the negation of that which is false.
A harmless hilarity and a buoyant cheerfulness are not infrequent concomitants of genius; and we are never more deceived than when we mistake gravity for greatness, solemnity for science, and pomposity for erudition.
In science, reason is the guide; in poetry, taste. The object of the one is truth, which is uniform and indivisible; the object of the other is beauty, which is multiform and varied.
No disorders have employed so many quacks, as those that have no cure; and no sciences have exercised so many quills, as those that have no certainty.
The acquirements of science may be termed the armour of the mind; but that armour would be worse than useless, that cost us all we had, and left us nothing to defend.
Professors in every branch of the sciences, prefer their own theories to truth: the reason is that their theories are private property, but truth is common stock.
It is not so difficult a task as to plant new truths, as to root out old errors
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