Admonitions to live in a "best case scenario" seem pretty pointless.
One thing I appreciate about the Catholic Church is they don't use the Holy Spirit as a philosophical "fairy godmother" that promises to correct any practical deficiencies in the implementaion of sound doctrine.
One may not like their answers, but they at least have the benefit of coming from some measure of practical experience as well as Scriptural doctrine.
You can have all the head knowledge of scripture; however, until you (not you personally, but any person) realizes that it is Christ in you--that is your hope of glory--then you will continually fail to live out the Christian life by trying to bear good fruit in your own strength.