Heretics by G.K. Chesterton

The world is round, so round that the schools of optimism and pessimism have been arguing from the beginning whether it is the right way up.

The difficulty does not arise so much from the mere fact that good and evil are mingled in roughly equal proportions; it arises chiefly from the fact that men always differ about what parts are good and what evil. Hence the difficulty which besets "undenominational religions." They profess to include what is beautiful in all creeds, but they appear to many to have collected all that is dull in them. All the colours mixed together in purity ought to make a perfect white. Mixed together on any human paint-box, they make a thing like mud, and a thing very like many new religions. Such a blend is often something much worse than any one creed taken separately, even the creed of the Thugs. The error arises from the difficulty of detecting what is really the good part and what is really the bad part of any given religion.