Every person is obligated to be aware that he has great worth. This does not refer to the illusory self-worth of arrogantly feeling better than others, but a true self-worth, enormous in size and scope. The Talmud says: “Every individual is obligated to say: ‘The world was created for me.'” Rashi explains that we must think “I have the importance of an entire world.”
Every human is a one-time phenomenon, with a unique blend of character traits and personality. Each is born in a specific time of history and in a specific environment. Never before and never again.
This uniqueness gives you great importance. Only you can accomplish your unique life tasks.
Sources: Alai Shur, vol.1, p.168; Gateway to Happiness, p.120