Jak przestać się martwić i zacząć żyć

His approach feels rooted in practical wisdom, but I'm curious what personal experiences or observations led him to emphasize worry so much.

Some techniques resonated deeply with me, while others felt a bit abstract. I'm interested in which strategies worked best for different types of worry.

The principles are time-tested, but I wonder if modern stressors require new approaches or adaptations of Carnegie’s methods.