The trouble with Christianity is, not that its failed, but that it's never been tried . . . not that it can't remake the world, but that it's difficult.
Of all the causes which conspire to blind Man's erring judgement, and misguide the mind, What the weak head with strongest bias rules, Is PRIDE, the never-failing vice of fools.
It is possible to fail in many ways . . . while to succeed is possible only in one way (for which reason also one is easy and the other difficult - to miss the mark easy, to hit it difficult).