It’s a sensitive topic in a lot of quarters, as it’s easy to play fast and loose with “spirituality” in a way that’s really unhelpful. I tried to navigate those waters yesterday at their place, which I encourage you to read in full and then leave comments and questions here.
A man, for instance, may fast for many reasons, some better than others. But when the practice ceases to be an obedient response to the confrontation with the grace of God in Jesus, it loses its distinctly Christian status as invocation, wherein we affirm that the God who made the world will someday return to make all things new. The reformation of the heart takes shape in the presentation of the body, and fasting is only Christian when it takes the character of offering, sacrifice, and worship.
The liberating grace of God also sets us free from the artificial standards of acceptance and validation that are based on body shape or type by exposing the stunted notions of “perfection” for the grotesque mimicry that they are. The pursuit of bodily perfection that makes some women cry when they turn 25 is a tragic parody of the more real, more beautiful body that has been given to God, just as the tragic hideousness of Good Friday has become the source and fountainhead of the best Christian art.