15 Six days may work be done; but in the seventh is the sabbath of rest, holy to the Lord: whosoever doeth any work in the sabbath day, he shall surely be put to death.

16 Wherefore the children of Israel shall keep the sabbath, to observe the sabbath throughout their generations, for a perpetual covenant.

17 It is a sign between me and the children of Israel for ever: for in six days the Lord made heaven and earth, and on the seventh day he rested, and was refreshed.

God states that observing the sabbath will be a sign between Him and the Israelites, and gives as a reason that He, too, did His work of creation in six days and rested on the seventh. Thus, for the Israelites this was an opportunity to pattern themselves after God, to be like Him all the way down to the level of how they conducted their weeks.

This speaks to our natural tendency to emulate those we most admire. We go far beyond just accepting their principles as our own, we try to use the same sorts of words and wear the same sorts of clothes that they do. There seems to be an intuition that if we can immerse ourselves in the surface behaviors, something will seep deeper into our soul to make us feel and think like our model as well.

While that doesn’t seem like it could be physically true, it may be true psychologically. When we feel ourselves in the shape and pattern of another, I believe we really do start acting and thinking differently. We should be careful who we start to look like, being sure it is someone that we really ought to act like. Certainly, there is no greater model than God Himself, so it makes sense to set aside the sabbath day in imitation of Him. Perhaps in following His pattern of weeks we will gradually develop His qualities.