The last sentence of our reading from Genesis says, “And [Abram] believed the Lord; and the Lord reckoned it to him as righteousness,”[1] so this text is often treated as a story of faith. But, in all honesty, this is a story of doubt. It is the story of Abram questioning God’s promise of a posterity; it is a story of tribalism and concern for bloodline, ethnicity, and inheritance.
We humans have a predisposition to tribalism, to congregating in social groupings of similar people. Think about the neighborhood and community where you live; I’m willing to bet that your neighborhoods are made up of people for the most part pretty similar to yourselves. Aside from clearly racist practices like red lining and sundown laws, we modern Americans may not consciously organize ourselves into tribal groupings, but if we look at ourselves honestly we will find that we do. Like attracts like. As individuals, we are initially situated within nuclear families, then as we grow we broaden our social interactions to extended families, then clan, tribe, ethnic group, political party, nation.
It’s genetic: our nearest relatives, the great apes and chimpanzees, demonstrate this same family and clan predilection. And it’s religious: we find it in sacred literatures across cultures. Today’s lesson from Genesis is a case in point.
When I was in the 8th Grade, I attended Robert Fulton Junior High School in Van Nuys, California, which is in the San Fernando Valley area of the Los Angeles metroplex. At some point during the year, Mrs. R. Smith, who taught English, gave my class an assignment to memorize and interpret a poem; we had to get up in front of the class, recite the poem, and then give our interpretation. When it came to be my turn, I recited my chosen poem, said what I believed it meant, and explained my interpretation. Mrs. Smith responded, “Your interpretation is wrong,” to which I replied, “I can interpret a poem any damned way I please!”
There is an old tradition in the church: on Trinity Sunday, rectors do their best to get someone else to preach. If they have a curate or associate priest, he or she gets the pulpit on that day. If not, they try to invite some old retired priest to fill in (as Rachel has done today). No one really wants to preach on Trinity Sunday, the only day of the Christian year given to the celebration or commemoration of a theological doctrine, mostly because theology is dull, dry, and boring to most people and partly because this particular theological doctrine is one most of us get wrong no matter how much we try to do otherwise. 
Come Holy Spirit, Comforter, Spirit of Truth,
When my nephew, who’s now in his mid-40s, was about six years old, he was given a homework assignment that he found frustrating and he just didn’t want to finish it, but his mother made him sit down and do it rather than something else more to his liking. In his frustration, he blurted out, “I hate you!” My late sister-in-law responded calmly, “That’s too bad because I love you.” After a moment of reflection, my nephew amended his angry outburst: “I love you, too,” he said, “but I don’t like you right now.”
I really don’t like television commercials, and I’m pretty sure I’m not alone in that regard. It’s a common complaint; we all talk about how much we dislike TV advertising. We all subscribe to Amazon Prime, Netflix, Hulu, and other streaming services so we can avoid them. And yet, sometimes a particularly memorable advertisement tag-line will worm it’s way into one’s regular conversation. My step-father had one of those: whenever my mother made anything even slightly piquant he would say, “Mama mia, that’s a spicy meatball,” which some of you may recognize from an old Alka-Seltzer commercial.
