Musar על שבת 236:4

ומקדשי תיראו . Relating to the Sanctuary with a sense of awe and remembering whose abode it is will implant within us [our hearts] the necessary reverence and humility even before we enter the Temple there to present our prayers. Nowadays, due to our sins, the synagogue takes the place of the Temple, and we call it the מקדש מעט the miniature sanctuary. We should relate to it as well as to the Torah scholars with the proper amount of reverence.

The Sages have said that if Israel had only kept their first Shabbos properly no nation or language could ever have had dominion over them and if they would only keep two Shabbosos they would immediately be redeemed (Shabbos 118b). This is because the commandment of the Shabbos is equal to the entire Torah (Shemos Rabbah 25:12). The Sages also say that whoever takes delight in the Shabbos is granted an unlimited inheritance (Shabbos 118b).