Goethe has a rich life, and his knowledge of life has been experienced from his fresh and lively life. In his "Talk Record", you can find a grain of diamond-like remarks. This grain of gold with stone remarks Although I am scattered everywhere, I don't want to take a picture, but the light reflects each other. What is the most correct understanding of the "diamond" metaphor in the text? ['Penetrating.', 'Has color.', 'Permanent.', 'Thoughtful.']