By Rabbi Dr. Michael Leo Samuel in Chula Vista, California 

Rabbi Dr. Michael Leo Samuel (SDJW photo)

A classic New Yorker cartoon shows a father scowling over a dismal report card while his young son stands beside him, looking up innocently and asking, “What do you think it is, Dad? Heredity or environment?”

Have you ever noticed how our belief in genetics skyrockets the moment one of our children does something brilliant? Heredity is a doctrine passionately embraced by parents whose kids bring home straight A’s. When they win the science fair, it’s “obviously from my side of the family.” When they draw on the living room wall with permanent marker, suddenly it’s the bad influence of the neighborhood kids.

Modern behavioral genetics supports the idea that biology plays a role. Studies of identical twins reared apart show that if one twin has a run-in with the law, the other is statistically more likely to follow suit than is the case with fraternal twins.

Similarly, adoption studies suggest that biological predispositions can nudge a person’s temperament. Of course, nobody believes there is a single “felony gene” programmed into our DNA—more like a biochemical thumb on the scale.

Which brings us to Jacob and Esau. The Torah tells us their rivalry didn’t just start in the sandbox; they were already throwing elbows in the womb. Rebecca didn’t need an ultrasound to know she had twins—she felt like she was hosting a middleweight title bout. How can two boys sharing the exact same prenatal apartment turn out so radically different? Can we blame the genes, or was there something deeper at work in the family dynamic?

Carl Jung famously noted that children often act out the suppressed, hidden parts of their parents’ personalities—what he called the “shadow.” Scripture bears this out with uncanny precision. Isaac, we are told, loved Esau because Esau was a cunning hunter, a man of the open field who knew the quickest way to his father’s heart was through his stomach—specifically, a well-seasoned plate of venison.

Why did Isaac gravitate so strongly toward the rugged outdoorsman? Because Isaac himself was a quiet, contemplative introvert who grew up in the massive shadow of his charismatic, extroverted father, Abraham. Rabbi Simcha Bunim of Peshischa captured the contrast beautifully: Abraham was a people-person whose warmth and hospitality drew the whole world to his tent, whereas Isaac preferred solitude and inner reflection.

When Isaac looked at Jacob—a mild-mannered scholar who stayed indoors meditating on the wonders of God—he saw a carbon copy of himself. Isaac worried that a quiet thinker lacked the bold, swashbuckling energy needed to carry Abraham’s movement into the wider world. Esau, Isaac figured, had the charisma; with a little spiritual coaching, the hunter could become a crusader.

Yet our tradition tells us Isaac was blind—not just physically in his old age, but figuratively when it came to sizing up his own boys. He completely missed Esau’s duplicity, and he wildly underestimated Jacob’s grit. Jacob was no passive clone; beneath that quiet exterior was a fierce determination to carve out his own destiny. Isaac had his head so far in the heavenly clouds that he couldn’t see the smoke rising from his own kitchen. It took Rebecca to gently remind her pious, overly trusting husband that if Jacob could pull off a disguise, Esau had been running circles around him for years.

How did Rebecca spot the con so effortlessly? Because she grew up in Padan-Aram with Laban—a man who practically invented creative accounting. Having survived a household where deceit was an Olympic sport, Rebecca had a finely tuned radar for manipulation.

Our parsha reminds us that active, perceptive parenting can break the cycle of even the most dysfunctional family tree. Fatherhood, in particular, carries immense weight. An engaged, clear-eyed father shapes a child’s emotional and spiritual backbone, whereas favoritism or emotional absence leaves a hunger that lasts well into adulthood. Whether the family baggage is addiction, anger, or—as in Isaac’s tent—playing favorites, we pass our unfinished business down to the next generation unless we consciously decide to rewrite the script.

In the Austin Powers movies, the villain Dr. Evil has a miniature clone named Mini-Me, who never speaks and simply mimics Dr. Evil’s every gesture—right down to putting his pinky finger to the corner of his mouth. Too many parents approach child-rearing hoping to raise a “Mini-Me.” Yet even in the movies, Mini-Me eventually rebels and insists on being his own person.

King Solomon put it best in Proverbs: “Educate a child according to his own way” (Proverbs 22:6)—not according to yours. Our children are not meant to be sequels to our own lives. To let them flourish, we have to recognize our own family blind spots and resist repeating the patterns we grew up with.

Nissim Ezekiel, the great Jewish poet of India, captured this prayer that ought to hang on every parent’s refrigerator:

“Protect my children—from my secret wish

to make them over in my image and illusions.

Let them move to the music that they love,

dissonant perhaps to me.”

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Rabbi Dr. Michael Leo Samuel is spiritual leader of Temple Beth Shalom in Chula Vista, California.