Work heartily, not lazily. Proverbs 6:6-11 tells us that most ants are more productive than most people! Every time a Christian is lazy in his work, every time he is not pursuing excellence, he becomes a thief. Does God really mean, “Thou shalt not steal?” Yes. Stealing in laziness is just as offensive as a pickpocket. Laziness in your vocation is stealing from those who are paying you for your labor, and it brings a reproach to God. If God commands us to pursue excellence, if he commands us to work heartily, if he commands us to serve Christ, less than this would be sin.
Always remember that to pursue excellence in your work, is to rely on the grace of God’s hand in all you do. Prayer is an important part of pursing excellence – you cannot do it on your own. Excellence cannot be achieved by personal merit, but only through divine grace. His divine power has granted this to us, but we must come to Him in prayer.
HT: A Puritan's Mind