Our relationship with God is complex, multidimensional. The Torah describes us as connected religiously, nationally, historically.
As of this Shabbat we will have read about three covenants, "britot" that God has made with humans. The first, the Brit with Noach, was a Brit with all humanity never to destroy the entire world again.
The other two are both in this parsha
In chapter 15 we read about the "brit bein habetarim". You can read the story here
The story of the second brit is a description of Brit milah which you can read here verses 9-14.
So why are there two different covenants? How are they the same? How are they different?
Rav Alex Israel shares his ideas and those of Rabbi Menachem Leibtag to understand these two separate britot. You can read his article here
Here is another thought from Rabbi Arnold Samlan, aka the Notorious RAV about Jewish connectedness you may want to read
How do you feel connected Jewishly? Are you part of the Jewish nation? The Jewish religion? Part of some other aspect of Judaism?