The Torah did not tell a Jew to make a pilgrimage to Jerusalem on Shabbat [as on festivals]. There is no need. On Shabbat the Shekhina [Presence] knocks on the door. All we have to do is let Her in.
— comment on the “Sanctification of the Day” blessing**
Koren Mesorat HaRav Siddur, p.520
**On Shabbat/Festivals, one “Sanctification of the Day” blessing replaces the middle 13 blessings of the daily Amidah. The first three and the final three remain unchanged: Avot [ancestors], gevurah [strength], Kedushat Hashem [sanctification of the Name]; Avodah [worship], Hodaah [thanks], Shalom [peace]. This gives the Shabbat Amidah a symbolic seven blessings.