In this sentence, the author compares himself to a pearl by metaphor. Pearl is a widely recognized and cherished gem, which symbolizes beauty, rarity and preciousness. However, pearls are often buried at the bottom of the deep sea and cannot be seen. This metaphor implies that the author feels that his value and talent have not been fully recognized and appreciated, and he is afraid that he will be buried out of public view.
The sadness in this sentence is also reflected in the author's fear of being buried. This kind of pain may be fear of being ignored, forgotten and marginalized. The author may be worried that his efforts and talents will be buried in the vast society and will not be given due attention and appreciation. This kind of worry and fear makes the author feel helpless and depressed, and further deepens the sadness conveyed by this sentence.
But this sentence is also a kind of self-reflection and warning. The author compares himself to pearls, reminding us to cherish our own values and talents, and strive to make them recognized and shine. The author's pain and worry can also be regarded as a kind of motivation to keep trying to avoid being buried in the corner of society.
Generally speaking, this sentence can be regarded as a sad expression, conveying the author's worries and fears that his value and talent have not been fully recognized. But it can also be regarded as a kind of self-reflection and warning, reminding us to cherish our own value and strive to make our own value shine. In any case, this sentence reflects people's fear of being buried and ignored, as well as their pursuit and desire for their own value.