It is necessary to hope... for hope itself is happiness. - Samuel Johnson

"Knowledge is of two kinds. We know a subject ourselves, or we know where we can find information on it."

"I would rather be attacked than unnoticed. For the worst thing you can do to an author is to be silent as to his works."

"That we must all die, we always knew; I wish I had remembered it sooner."

"Friendship, like love, is destroyed by long absence, though it may be increased by short intermissions."

"Life affords no higher pleasure than that of surmounting difficulties, passing from one step of success to another, forming new wishes and seeing them gratified."