Two words that echo the message of Shabbat http://www.sun-sentinel.com/florida-jewish-journal/fl-jjps-torah-0817-20160816-story.html
It can be suggested that zakhor is a direction to the mind; to remember the Shabbat. Shamor on the other hand, means to observe through action. Here, the Torah may be suggesting that it is important to translate thinking and contemplating Shabbat into doing Shabbat.
