A man who has to grow his business in difficult times — through recessions, times of cultural and technological transition, and changing consumer demands — will have to become an expert in order to succeed.

在经济衰退、文化和技术转型以及消费者需求不断变化的困难时期，一个人必须发展自己的实务，为了成功，他必须成为一名专家。