The result of this course is, that all other good works are done in a lukewarm spirit, are mixed up with much self-seeking and secret imperfections, and are accompanied by a certain self-esteem, and by a desire for the praise and appreciation of the world.
Such persons not only fail to advance in the way of salvation, but, by turning back, stand in danger of relapsing into their old sins; because they have no love for true virtue, and show little gratitude to the Lord Who rescued them from the bondage of the Devil. Moreover, they are too blind and ignorant to see their real danger, whilst they delude themselves with the idea that they are in a safe condition.
Here we discover a great error, and one so much the more injurious as it is the less guarded against. Many who aspire to the spiritual life, being rather lovers of themselves than of that which is needful (although indeed they know it not), select for the most part those practices which accord with their own taste, and neglect others which touch to the quick their natural inclinations and sensual appetites, to overcome which all reason demands that they should put forth their full strength.
Therefore, beloved, I advise and entreat you to cherish a love for that which is painful and difficult, for such things will bring you victory