Whatever you do, work at it with all your heart, as working for the Lord….
It’s interesting, the context of this verse, which we often don’t consider, but it’s referring to slaves in their work for their masters. Read the whole (click link), and while some may think it’s a Biblical okay for slavery, it seems to me that in it are the seeds of freedom even in this world from that, and not just the world to come. The text suggests that they should think of themselves working for the Lord rather than their masters.
That seems to suggest to me that no matter what work we may have, of course barring anything forbidden by scripture, that we too should do our very best as to the Lord, putting our entire heart into it. And when we do, it’s for us a part of obedience to the first and great commandment, while not forgetting the second like it:
“Teacher, which is the greatest commandment in the Law?”
Jesus replied: “‘Love the Lord your God with all your heart and with all your soul and with all your mind.’ This is the first and greatest commandment. And the second is like it: ‘Love your neighbor as yourself.’ All the Law and the Prophets hang on these two commandments.”
So we give our hearts completely to the Lord, and to nothing else. And in doing so, we also love our neighbor as we love ourselves. So that work is not a means in itself, or something for our own glory, but for the glory of God, and for the good of others.
This is the only way to live, with a full heart, all of it. Never halfhearted in anything. Always giving everything our all in everything, yes, including rest, and always with love for others. All of this in and through Jesus.