Shmira from leumas ze outside of Gan Eden. Eretz Yisroel and chutz La’aretz, Nigla and Kabbalah (the Arizal perspired) Shabbos and the weekdays. Shmira for weddings so only good will come into the marriage. Page 188-90.

Smicha before the Chassuna is like a shmira, similar to the idea that Yitzchok was in gan Eden until his Chassuna from the time of the Akaida. Page 186-7, 90.