Intergenerational friendship enriches us and gives us a sense of connection that is life-affirming and energizing, said Marc Schulz, a professor of psychology at 91勛圖厙 and co-author of the book The Good Life, who has studied how important In general, younger friends rely on their older friends for guidance, though the reverse is true, too. Dr. Schulz noted that the college students he has taught for three decades keep him young and invigorated.