Eric - I have a background in researching New Age cults that often have a mix of existential philosophy and eastern religions in them. One of the primary demands imposed on cult members is “The demand for purity”. Members tend to purge themselves extensively thinking that they will rid themselves of past and present sin or compulsive / negative behaviour. What they don’t relaise is that we are a fallen people through original sin and it is only through Chirst passion and death that we have a chance in salvation if we turn to Him. This is the big difference between us and the cult members. Jesus works in us through the power of the Holy Spirit to illuminate those parts of our lives that need housekeeping and we in turn ask for His Grace through the sacraments to change our hearts.
For me, corporal mortifications such as wipping, hair shirts or using devices such as Opus Dei use etc, blur the boundaries between our Catholic Faith and the philosophies I have just spoken about.
I do understand the value of temperence and denial as these are character building but we must not feel compelled or feel guilty for not mortifying ourselves ie (fasting though this can be a good practice and is recommend by Our Lord when combined with prayer) - that maybe ol’e nick is trying to take our joy away.
The beautitudes are a good model.
Luke