As a science, logic institutes an analysis of the process of the mind in reasoning, and investigating the principles on which argumentation is conducted; as an art, it furnishes such rules as may be derived from those principles, for guarding against erroneous deductions.
Richard WhatelyThe attendant on William Rufus, who discharged at a deer an arrow, which glanced against a tree and killed the king, was no murderer, because he had no such design. And, on the other hand, a man who should lie in wait to assassinate another, and pull the trigger of a gun with that intent, would be morally a murderer, not the less though the gun should chance to miss fire.
Richard WhatelyIt is not that pearls fetch a high price because men have dived for them; but on the contrary, men have dived for them because they fetch a high price.
Richard Whately