I agree with everything you say (except that I should publish anything on the subject: a bachelor is not the man to do it—there is such an obvious answer to anything he says!).
Our regeneration is a slow process. As Charles Williams says there are three stages: (1.) The Old Self on the Old Way. (2.) The Old Self on the New Way. (3.) The New Self on the New Way.
After conversion the Old Self can of course be just as arrogant, importunate, and imperialistic about the Faith as it previously was about any other interest. I had almost said ‘Any other Fad’—for just as the loveliest complexion turns green in a green light, so the Faith itself may have at first all the characteristics of a Fad and we may be as ill to live with as if we had taken up Nudism or Psychoanalysis or Pure Wool Clothing. You and I, clearly, both know all about that: one makes blunders.
About obedience, the principle is clear. Obedience to man is limited by obedience to God and, when they really conflict, must go. But of course that gives one very little guidance about particulars. The converted party must pray: I suppose it is not often necessary to pray in the presence of the other! Especially if the converted party is the woman, who usually has the house to herself all day.
Of course there must be no concealment, in the sense that if the question comes up one must say frankly that one does pray. But there is a difference between not concealing and flaunting. For the rest (did I quote this before?) MacDonald says ‘the time for speaking seldom arrives, the time forbeing never departs.’ Let you and me pray for each other.
From The Collected Letters of C.S. Lewis, Volume III