One of the most famous commandments in all of Torah is also one of the first: P'ru u'rvu, be fruitful and multiply. It is a phrase that has shaped Jewish families and communities for thousands of years. We understand it as an instruction to have children, to build families, and to ensure that another generation will follow us. But I wonder whether we have spent so much time focusing on the second half of that commandment, multiplying, that we have neglected to ask what it actually means to be fruitful. Are these simply two ways of saying the same thing, or might our tradition be asking us to fulfill two different responsibilities?
Our Torah seems to recognize this tension almost immediately. God promises Abraham that he will become a great nation, with descendants as numerous as the stars in the sky. There is only one rather significant problem. Sarah cannot have children. And in this week's portion, Vayera, when Sarah overhears that she will finally give birth to a son, she laughs. It is almost as if she is saying, "You've got to be kidding me." Sarah is hardly alone. Rebecca will struggle to conceive, as will Rachel. Three of our four matriarchs experience infertility. For a tradition that places such extraordinary emphasis on reproduction, it is remarkable that our founding families struggle so deeply with the very thing we are commanded to do. Perhaps the Torah is inviting us to recognize that creating a people is about more than creating descendants.
The Talmud offers a remarkable expansion of this idea. In Sanhedrin 99b, three rabbis explore what happens when someone teaches another person's child Torah. Resh Lakish teaches that the teacher is credited as though they had created the student. Rabbi Elazar suggests that the teacher is credited as though they had created the words of Torah themselves. And Rava offers a third possibility: the teacher is credited as though they had created themselves. These three interpretations suggest three extraordinary ways of understanding creation. We create through the people we help shape, through the traditions we bring to life, and through the ways we ourselves are transformed by our relationships. Anyone who has spent time teaching knows that the relationship between teacher and student is rarely one-directional. I know that each week, when I sit down to study Torah with members of our community, I leave having learned something myself. The people we teach become part of who we are, just as we become part of who they are.
But our tradition does not stop at the relationship between teacher and student. In Sanhedrin 17b, the rabbis describe the institutions necessary for a community to sustain a life of Torah. They include a justice system, charitable infrastructure, medical care, and teachers. But Rabbi Akiva adds something unexpected: a variety of fruit, because fruit illuminates the eyes. What a remarkable addition! After listing the practical necessities of communal life, the rabbis insist that there must also be something sweet. Something that brings joy, pleasure, and vibrancy into the community. A community cannot survive on infrastructure alone. It needs reasons for people to love being part of it. We can build the most extraordinary institutions, but if they do not nourish the people within them, what exactly have we created?
Perhaps this is the distinction between being fruitful and multiplying. Multiplication is about quantity. Fruitfulness is about quality. We can bring countless children into the world, but if we fail to nurture their identity, cultivate their curiosity, or create communities worth belonging to, what exactly have we built? And conversely, someone who never has children may still live an extraordinarily fruitful life through teaching, mentoring, creating, caring, and shaping the lives of others. These are not lesser contributions to the future. They are among the very things that make a future possible. Our tradition understands that continuity cannot be measured exclusively through biology. It must also be measured through the relationships and values we pass from one generation to the next.
In Vayera, Sarah's laughter eventually becomes the name of her son, Isaac, Yitzchak, whose name is connected to laughter. What began as disbelief becomes a source of joy. I love the possibility that the very promise of continuity is wrapped in something so deeply human. Not simply the arrival of another child, but the arrival of laughter, possibility, and a future that once seemed unimaginable. God promises Abraham that he will become a great nation. But our responsibility is not simply to increase our numbers. It is to ensure that the generations who follow inherit something worthy of continuing. A community with compassion and curiosity, with teachers and caretakers, with a shared sense of responsibility and enough sweetness to illuminate our eyes.
Be fruitful and multiply. Perhaps these are not redundant instructions, but two different responsibilities. One asks us to ensure that life continues. The other asks us to ensure that life is worth living.
