The Talmud is analyzing why a younger brother cannot perform Yibum with the widow of a brother that passed away before he was born. To illustrate how this is possible, imagine two brothers, Abe and Ben, married to Alice and Becky. Abe dies without children, and Ben marries Alice in Yibum. Then a new brother Carter is born, so Ben again has a paternal brother. If later on Ben himself dies without children, his widows Alice and Becky are potentially eligible for Yibum with Carter.
However, since Carter was never in the world at the same time as Abe, according to most of the sages he cannot marry Alice, only Becky. Rabbi Shimon would allow Carter to marry either widow, since when he was born Alice was already the wife of Ben, not the widow of Abe. From Carter’s perspective she was always permitted, he never even knew Abe.
The Gemara uses an interesting language for such a brother: he was never in his world. Now, the world is not “his”, this teaches that a person’s world is in a very real sense limited to what they personally experience. Yes, we all know intellectually about historical events that occurred before we were born, but they seldom have any practical effect on us. We are the product of our own generation and life experience.
This is an important fact to keep in mind when dealing with people who are a decade or two older or younger than yourself. People see the world only through their own lens, which has been shaped and polished by their past. This is true of people of any age – each man experiences life through the filter of his own mind. Someone 20 or 30 years older than you will have a very different lens. They may have a wildly divergent understanding of life, use different words for the same concepts, and may be familiar with things you never heard of.
When dealing with younger people, it may be tempting to act their age by mentioning current trends or personalities. However, younger people may be more impressed by what you have accomplished. Since you have had more time to develop yourself, your character, and your abilities, you should be able to demonstrate maturity and mastery to younger people.
Instead of pretending to be a peer and stumbling, recognize the differences and learn from men of different generations. Expand your own horizons by talking to younger and older men. Every man is in his own world.
