Pamela is a non-conformist in spirit although she attends/supports the Anglican Church. Her religious feelings/convictions are crucial to the story since they motivate her continual resistance of Mr. B. She does not resist him because she is revolted by sex or afraid of disobeying her parish priest. She resists him because she believes that her status before God is not contingent on her status as a servant. Her master may appoint clergymen; that doesn't give him rights to her soul.
In the 13th and 14th installments of Mr. B Speaks! Pamela's gainsayers entirely fail to understand the nature and reality of her religious attitudes, falling back instead on cliches about "religious people"; I based these scenes on my own experience in academe. Academic critics quite often fail to appreciate non-political/non-sociological factors in general, resulting in the rather bizarre black-hole that dogs much literary criticism.
As a member of the wealthy upper-class--though not the intelligentsia--Mr. B has little interest in personal conversion (at least in Book 1). However, he would not have endorsed atheism. Although atheism was bandied about eighteenth century English literary circles, belief in the supernatural was too strong for atheism to have any lasting impact. (I am referring specifically to atheism as the deliberate proposal that there is no god or gods rather than as a challenge to orthodoxy/state religion; the second was common in the eighteenth century while the first was practically unheard of.) The average intellectual was more likely to be a deist than an atheist. It would take another 100 years for atheism to become "cool."
|Sir Humphrey laying down the|
|unwritten rules of society.|
This pretty much encapsulates the eighteenth-century, upper-class attitude towards the Church of England: "I may not believe or go or care, but it's vital to know that it's there! (Now please stop harping on and on about it.)"