1 Cor. 10:31-33 (ESV)
So, whether you eat or drink, or whatever you do, do all to the glory of God.  Give no offense to Jews or to Greeks or to the church of God,  just as I try to please everyone in everything I do, not seeking my own advantage, but that of many, that they may be saved.
What ever you do, do all to the glory of God. I love that. It is technically speaking law. I am being commanded to do something, namely give glory to God. This is something I by nature, sinful nature, cannot do, nor would my sinful nature care to do this. Sinful nature wants only to give glory to the self. It will even feign giving glory to God, in order to glorify itself. It makes a show of piety. My sinful nature, though, is much more inclined to make a show of self-indulgence. (Just being honest, an ascetic I am not.) I think man is born with one of two types of sinful natures, and they are never rid of them till they die. Some are born with an ascetic nature. (An ascetic is one who denies himself worldly pleasure, and I think in a masochistic way finds pleasure in denying himself/herself pleasure.) Others are born with a more hedonistic nature. ( We all know what a hedonist is.) But at the core is sin, sin that would stand before God on its own merits, or sin that would write God off. So the ascetic would deny God His glory by what He gives up, and trying to save himself by denying himself. The hedonist would deny God His glory by not giving Him the time of day. The Christian though will give glory to God in what ever they do. (Implied here, is that in what ever you is in accord with the Ten Commandments, kind of hard to give God glory while fornicating.)
But I do like to know that as I go home for lunch now, I will be giving Glory to God, simply by eating a hotdog, and drinking a beer. Could it really be that justified by the blood of Christ, God finds such mundane things as self nourishment to be glorifying Him? No wonder, the sheep in Matthew 25 could not recall their good works!