One of the dangers of purposeful virtue; by practicing it for long, you risk becoming so enamored by your apparent self-righteousness that pride, that same sort of pride that caused one angel to revolt, slowly ensnares you into conflating yourself with God. You imitate Him in the wrong way, not through prayer and counsel but by flawed self-restraint. At the beginning it'll seem noble and saintly, and not a single drop of that wretched sin may be present in you; But as time passes by, if daily ye not ask, begging to God for his mercy, you'll think of yourself as self-sufficient. You'll think as if sin was beat, and it could tarnish you no more. Oh, shame! That out of good intentions could one fall to such a sin, but no good intentions can raise a man to god. He who fully insists on being the master of his own self gets eventually devoured by this monster; it is God who wards him off. Don't drop your guards! It lurks and stalks you for the rest of your life. Allow for it to lay a single foot in your castle and in due time he'll be its lord!