Then marriage is slavery. :) We are "enslaved" by those we love!? Unfortunately, being a slave means being forced to obedience. He is equating being in love with being "forced"; he is equating the love for God with physical pleasure of sin. So, then, love becomes slavery, pleasure results in obedience, etc...I really don't think he meant it that way. I think our translations are not contemporary enough to express the meaning of his statement. Slavery in those days was not considered in the same light as it is today. So the term is obsolete to say the least.
Look, there is none who is totally "enslaved" by righeousness. Not one who is not driven by physical and material pleasures of life. So, what shall we do? Continue to sin because we are under grace? Apparently, Martin Luther thought we ought to by his famous "Pecca fortiter..." statement.
Apostolic Churches continue to use Jewish customs of fasting, and have instituted confessions and other disciplines of repentance to remind us that we continue to sin even if we cleave to God and regret our ingratitude to Him.
Being Orthodox is the best thing in the world, in part because it involves our self-denial more than any other church does, but it's not easy if you want to do it right. Comfort is never an issue whether it means standing for two hours in church or denying yourself the pleasures of life and food, it is a reminder that we are still slaves to sin (the Orthodox fast 180 days out of the year, and on days when everyone is having fun -- Wednesdays and Fridays!). I don't see Protestants giving up anything for God, maybe I am wrong, but I just don't see it.
This is not bragging. We do it because we want to. For the love of God. I don't see myself enslaved; I can say no to sin or to God. It's my choice.
Luke 5: 33-35. We fast everyday of our lives.