Neither this belief nor any other will automatically remain alive in the mind.  It must be fed.  And as a matter of fact, if you examined a hundred people who had lost their faith in Christianity, I wonder how many of them would turn out to have been reasoned out of it by honest argument?  Do not most people drift away? (C. S. Lewis, Virtue and Vice)

"Vice and Virtue to the modern ear convey meanings twisted by our own culture and behavior. The word vice sounds benign, describing fundamentally harmless habits and attitudes, the kinds of things normal people do and feel."  C. S. Lewis, Virtue and Vice

“To love sin is far worse than to commit it, for a man may be suddenly tripped up or commit it through frailty.” Arthur W. Pink, A Fourfold Salvation

"The law of gravity tells you what stones do if you drop them; but the Law of Human Nature tells you what human beings ought to do and do not." C. S. Lewis, Mere Christianity

There is the unwritten law in the mind of humankind that I call the law of "expectation."  Depending upon the circumstance our mind will have certain preconceived notions as to how things ought to be.  This is a good thing because it enables us to see.  According to the experts, sight is 90 percent imagination.  If it were not for our experience, our mind would not be able to rightly interpret the images that our eyes deliver to our cerebral cortex.  Our sight and our memory play a harmonic role in allowing us to see both familiar things and those things new to us without becoming disoriented.

Virtue — Moral goodness; the practice of moral duties and the abstaining from vice, or a conformity of life and conversation to the moral law.  (Noah Webster)