There is pleasure in the pathless woods, there is rapture in the lonely shore, there is society where none intrudes, by the deep sea, and music in its roar; I love not Man the less, but Nature more.

This quote is saying that people should enjoy spending time alone in nature. They may find pleasure in a pathless woods, excitement on a lonely shore, peace where no one disturbs them on the deep sea, and music in the roar of the waves. Although spending time alone in nature is enjoyable, the author does not love human beings less, but in fact, loves nature more.