Frederick Turner, John Muir: Rediscovering America
(1985; rpt. Cambridge: Perseus Publishing, 2000), p. 69:
Old-time Scots Calvinism had held that one sure way to recognize a sinner was that he delighted in looking at natural objects, for such objects were fated for eventual destruction, and so to delight in them was an offense against the Lord.
Id., p. 129:
The two had fought on and off through the summer, the elder man regarding the younger's nature studies as a species of sin; the son retorting that in the fields and woods he was a good deal closer to God than his father was, however much the latter might read his Scriptures and Foxe's Book of Martyrs.