Chapter IV., Of the Relative Importance of Truths:--Secondly, that Rare Truths are more important than Frequent Ones

§1.	No accidental violation of nature's principles should be represented.	64
§2.	But the cases in which those principles have been strikingly exemplified.	65
§3.	Which are comparatively rare.	65
§4.	All repetition is blamable.	65
§5.	The duty of the painter is the same as that of a preacher.	66