Again, I was listening to Zac Poonen (huge grin), and he provided a wonderful explanation for 1 Cor 6.12 [i]You say, “For me, everything is permitted”? Maybe, but not everything is helpful (profitable). “For me, everything is permitted”? Maybe, but as far as I am concerned, I am not going to let anything gain control over me.[/i] CJB
Zac explained that that verse exposes two different types of Christians; the one who has to ask, "How close can I get before I go over the edge?" He said that one is careless and will build his house next to the edge and although he may not fall over the edge, his children will while they are out playing. And the other Christian though he is free to do the same will not because it is not profitable for him.... here or in eternity.
Clearly, it's your job and you (like any of us) are free to go home whenever you want but what is more profitable for you? And to take this a step further, what is more profitable for your family? Remember this... you cannot make what you do a "law" in your life! Some days, it might be profitable to stay and some other days, it might be more profitable to go home and spend that time with your family.
There is an old saying that makes much more sense in these economic times: "Make hay while the sun shines!" My God-fearing pastor years ago used to tell us, "When you get overtime, do NOT think you are 'in the money' and go shopping....overtime pay is to pay off debt not to make new debt." (huge grin) Some listened and some didn't. God is STILL a good God!!
God bless you brother!! Don't beat yourself up about going home!!