What is the great truth in anthem?

In Ayn Rand's novella Anthem, the great truth is the importance of individualism and the pursuit of personal values and desires. The protagonist, Equality 7-2521, discovers that the collectivist society he lives in suppresses individual thought and creativity, leading to stagnation and misery. He rebels against this system and embraces his individuality, becoming a symbol of personal freedom and self-expression. The great truth in Anthem is that individuals should not sacrifice their own values and dreams for the sake of conformity or social harmony, but should strive to express their uniqueness and achieve personal fulfillment.