This document discusses the importance and challenges of selling. It states that selling is essential for acquiring new customers and clients, and that everyone is involved in selling to some degree, whether externally to customers or internally to colleagues. It also outlines many of the skills and qualities needed to be a successful salesperson, such as endurance, persuasiveness, and the ability to adapt to different situations. The document emphasizes that selling is a key profession that plays a vital role in keeping businesses running successfully.