"In my whole life I've never been good at something I wasn't very interested in. It just doesn't work. There's no substitute for strong interest."

Charlie Munger - The nickname of Charles Thomas Munger, (1924 –  2023) American businessman, investor, and philanthropist. From 1978 until his death in 2023 , he was vice chairman of Berkshire Hathaway. Warren Buffett. described Munger as his closest partner and right-hand man, and credited him with being the "architect" of modern Berkshire Hathaway's business philosophy. More 

Source:  All I Want To Know Is Where I'm Going To Die So I'll Never Go There: Buffett & Munger