1)
What is considered "Shome'a Li"?
1.
Orchos Tzadikim (Sha'ar ha'Ratzon DH Kol Mi): He puts his Da'as to Hashem's will, and does not defy his Rebbeyim and someone greater than himself.
2)
What is "Lishkod"?
1.
Rashi: It is to guard.
3)
What is the significance of "Lishkod Al Dalsosai"?
1.
Rashi: He enters the Beis Midrash and Beis ha'Keneses first, and leaves last.
2.
Malbim: The verse depicts that Chachmah sits closed in its place - "Kevudah Vas Melech Penimah" (Tehilim 45:14). No man sees her; the doors are closed. One who seeks it must be very diligent at the doors, to wait for when they will open. He will find Chachmah when it is seen via the opening.