The lawyer writes in his letter, "the geniuses of all ages and of all lands speak different languages, but the same flume burns in them all." What does he mean by this? Is it true?

The lawyer is all about learning languages to follow the wisdom of scholars around the world. He notes that although geniuses may speak in different languages, they all share the insatiable thirst for similar ideas like knowledge, wisdom, and truth. I suppose they all search for something more. They have similarities but I'm not sure their desire and motivations are as romantic as the lawyer believes it to be. .