Unreality is a sin

Profession beyond our feelings is only a fault when we might help it;—when either we speak when we need not speak, or do not feel when we might have felt. Hard insensible hearts, ready and thoughtless talkers, these are they whose unreality, as I have termed it, is a sin; it is the sin of every one of us, in proportion as our hearts are cold, or our tongues excessive.

(...)

But dismissing this subject, I would have you observe, that as far as we are given to know it, Adam's state in Eden seems to have been like the state of children now—in being simple, inartificial, inexperienced in evil, unreasoning, uncalculating, ignorant of the future, or (as men now speak) unintellectual. The tree of the knowledge of good and evil was kept from him.

(...)

[God] meant us to be simple, and we are unreal; He meant us to think no evil, and a thousand associations, bad, trifling, or unworthy, attend our every thought. He meant us to be drawn on to the glories without us, and we are drawn back and (as it were) fascinated by the miseries within us. And hence it is that the whole structure of society is so artificial; no one trusts another, if he can help it; safeguards, checks, and securities are ever sought after. No one means exactly what he says, for our words have lost their natural meaning, and even an Angel could not use them naturally, for every mind being different from every other, they have no distinct meaning.

JHN, extracts from Parochial and Plain Sermons

http://www.newmanreader.org/works/parochial/volume5/sermon3.html
http://www.newmanreader.org/works/parochial/volume5/sermon8.html
http://www.newmanreader.org/works/parochial/volume8/sermon18.html