Exodus 31: Good Work, Bad Work

In the first half of Exodus 31, we learn that any kind of work can become a holy calling.  God points Moses in the direction of two skilled craftsmen that He has in mind to work on the construction of the Tabernacle: Bezalel and Oholiab.  There is no sacred/secular distinction here between work that God is calling them to do and physical labor.  On the other hand, the second half of chapter 31 reveals that work must be kept within the bounds of a six-day week.  Capital punishment is prescribed for those who would desecrate the Sabbath by working on it.  THAT is how serious God takes the commandment to rest on the Sabbath and keep it holy!