This text offers a profound reflection on the nature and sustainability of human friendship over time, drawing upon Samuel Johnson's advice regarding the necessity of constantly maintaining one's social bonds. The author explores the idea that while a life devoid of friends is inherently impoverished, preserving a permanent relationship is a rare phenomenon requiring specific conditions. The primary obstacle identified is the individual development of each person; unless friends move through life along parallel paths, estrangement becomes almost inevitable. The essay analyzes the internal dynamics of these bonds, suggesting that the longevity of a friendship often depends on a certain imbalance—a combination of a leading personality and a loyal follower. Between equals, however, competition often arises, leading to eventual separation. Ultimately, lasting friendship is likened to great love, with both being viewed as equally rare treasures. The text thus provides a realistic perspective on the volatility of human destinies, which shape our closest connections and determine their endurance or dissolution through the years.