In the Song וְשָׁמְרוּ sung on Friday night by Chassidim
וְשָׁמְרוּ בְנֵי יִשְֹרָאֵל אֶת־הַשַּׁבָּת, לַעֲשׂוֹת אֶת־הַשַּׁבָּת
Translated literally as: And you shall watch the Shabbos, make the Shabbos
What is the difference between the two parts of the statement it would seem that watching the Shabbos and making the shabbos are two ways too say the same thing so why say both?