Final answer:
The alchemist's quote suggests that people often doubt personal achievements and overlook inner strengths and treasures.
Step-by-step explanation:
The quote from the alchemist, 'When you possess great treasures within you, and you try to tell others of them, seldom are you believed', can be interpreted as people doubting personal achievements.
The alchemist suggests that the inner strengths and treasures that one possesses may go overlooked or unappreciated by others. This quote can relate to one's own life by reminding us that sometimes the value of our accomplishments or talents may not be recognized by others, and that it is important to believe in ourselves and our own potential.