Step 1: Understanding the Concept of "Nothingness."
The poet uses the phrase "It will never pass into nothingness" to emphasize the eternal nature of beauty. He believes that beauty, once created, never fades or disappears; it continues to exist in the minds of those who experience it.
Step 2: The Immortality of Beauty.
This line suggests that beauty does not die or lose its value over time. Instead, it endures and continues to be appreciated, offering joy and comfort to those who behold it.
Step 3: Conclusion.
The poet's use of "nothingness" signifies the idea that beauty remains forever alive in our hearts and minds, even when the physical form may no longer be present.
Final Answer: \[ \boxed{\text{The poet says, "It will never pass into nothingness" to highlight the everlasting nature of beauty. It never fades, continuing to inspire and provide joy long after its creation.}} \]