The theme of nature in art has almost always been present whether in American art, Korean art, or art from any other culture. Sometimes its depiction can be literal or even abstract, narrowing it down to just colors of the natural world. Nature can be a simple add on to a painting to convey a sense of depth, or perspective. However, it can also be the main focus of a work of art. Just like nature can be recreated through art, it can also be used as a stand in for greater thought. A realistic depiction of a mountain for example can symbolize not only the sublime, but also curiosity for the unknown. Depictions of nature can also be about intellectual thought and spirituality. Art involving nature can be done simply to display the beauty of the natural world around us, to make scientific observations in an environment, or to open our minds to philosophical ideas about our own connection to nature and beyond. The philosopher Aristotle once wrote that "Art not only imitates nature, but it also completes its deficiencies." This can be interpreted as art not only recreating the natural world but also creating new ways in which to see it in another light. In other words, art is the missing voice of what nature lacks to speak.