Say, there is a book written by Tolstoy sitting right there on the table. To our unique human consciousness, the reality of the papers in the book, is infinitely different from the valuable literature that they possess. For the kind of consciousness possessed by the bug which eats those papers, literature is non-existent, yet for the Human Consciousness, literature has a greater value of truth than the papers themselves.
Every living creature on this planet, has a conscious subjective perspective of the world. The plants may seem to us as standing indifferent to the human sufferings, but even they have their own unique mental universe. They have their own way of interacting with the environment.