In Tao Te Ching, this sentence describes the operation of the universe and the laws of nature. Emphasize the principle that heaven and earth are ruthless and equal. Heaven and earth are different from human beings, with feelings and subjective consciousness. They don't distinguish between good and evil, high and low, and treat everything equally and fairly. Treating everything as straw dogs shows that they have not given special value, and they attribute everything to ordinary and equality.
The expression of this sentence is exaggerated to emphasize that heaven and earth treat everything impartially and are not influenced by personal cuteness or abomination. It reminds people to transcend personal preferences and prejudices, treat things objectively like heaven and earth, and understand that things are only insignificant in the universe. It reflects the viewpoint of Taoist philosophy, and advocates that people should conform to the way of nature, not pursue personal interests excessively, but treat everything with equality and humility.
Generally speaking, this sentence conveys an attitude that transcends the individual, treats everything with an equal and fair mind, and is not affected by emotions and prejudice, reaching the realm of detachment and tolerance.