You have not yet acquired perfect love if your regard for people is still swayed by their characters – for example, if, for some particular reason, you love one person and hate another, or if for the same reason you sometimes love and sometimes hate the same person.
The devil cannot enter the soul that is in love with Christ.
You don’t become holy by fighting evil. Let evil be. Look towards Christ and that will save you. What makes a person saintly is love!