What best describes the tone of speech in audio recording his Nobel Prize address?

The tone of speech in audio recording of his Nobel Prize address is inspiring and visionary. He expresses his gratitude for the honor and recognition, and reflects on the importance of scientific discovery and the pursuit of knowledge. He emphasizes the need for international cooperation and collaboration in scientific research, and calls for a commitment to science and education for the betterment of humanity. The speech is characterized by a sense of optimism and a strong belief in the potential of science to solve global challenges.