"If children were taught to regard the humble round of every-day duties as the course marked out for them by the Lord, as a school in which they were to be trained to render faithful and efficient service, how much more pleasant and honorable would their work appear. To perform every duty as unto the Lord, throws a charm around the humblest employment, and links the workers on earth with the holy beings who do God's will in heaven. CE 217.1"
"And whatsoever ye do, do it heartily, as to the Lord, and not unto men;"
The EGW passage directly echoes the principle of doing all things as unto the Lord, as stated in Colossians 3:23. It applies this principle to everyday duties.