So what test do you use to determine that you are not being duped by the devil or yourself? Quite frankly, all thoughts that enter into our mind are not God's Spirit enlightening us...
Regards
Discerning love of self and love of the world vs. love of the Lord and love of the neighbor is not all that difficult. That's what evil and falsities vs. goodness and truth boil down to, isn't it?
It's always good to realize when we are following the Lord's path and doing His will.