Assuming a rational, human agent, are there any worthwhile behavior heuristics which lead to statements that follow this pattern: "This behavior will not be ok for me in the future, and has never been ok for me in the past"?

That depends on something other than the words you use -- it depends on whether "not ok" is being interpreted as referring to the person or the behavior.

In terms of effectiveness at changing behavior, our friends in the religious conspiracy got at least one thing right: "love the sinner, hate the sin."