Why does the man cautions Walton against his search for knowledge and wisdom.?

The man cautions Walton against his pursuit of knowledge and wisdom because he believes that such aspirations can lead to dangerous consequences. He warns that the relentless quest for understanding can result in isolation, obsession, and ultimately, destruction, as seen in his own tragic experiences. This serves as a cautionary tale about the potential perils of unchecked ambition and the pursuit of forbidden knowledge.