A "classic" is a book that everybody praises but nobody has read
Our best built certainties are but sand-houses and subject to damage from any wind of doubt that blows
If there are no cigars in heaven, I shall not go.
Always do what is right. It will gratify half of mankind and astound the other.
Man is without doubt the most interesting fool there is. He concedes that God made the angels immune from pain and death, and that he could have been similarly kind to man, but denies that he was under any moral obligation to do so.
Concerning the difference between man and the jackass: some observers hold that there isn't any. But this wrongs the jackass.