A thing may be too sad to be ...

A thing may be too sad to be believed or too wicked to be believed or too good to be believed; but it cannot be too absurd to be believed in this planet of frogs and elephants, of crocodiles and cuttle-fish.
A thing may be too sad to be believed or too wicked to be believed or too good to be believed; but it cannot be too absurd to be believed in this planet of frogs and elephants, of crocodiles and cuttle-fish.

Quotes from the same author

Men always talk about the most important things to perfect strangers. In the perfect stranger we perceive man himself; the image of a God is not disguised by resemblances to an uncle or doubts of wisdom of a mustache.
A change of opinions is almost unknown in an elderly military man.
Men reform a thing by removing the reality from it, and then do not know what to do with the unreality that is left.
The power which makes a man able to entertain a good impulse is the same as that which enables him to make a good gun; it is imagination.
The doctrine of human equality reposes on this: that there is no man really clever who has not found that he is stupid.