12-14. Human cares are lightened in proportion to our power of
sympathising with nature. The very beatings of our heart acquire a
certain grandeur from the fact that they are a process of nature and
linked thus to the general life of things. It is possible that "beatings
of the heart" may figuratively represent the mere play of the emotions,
and thus have a bearing upon the words "pain and fear" in line 13.
15. FELLOWSHIP. Communion with nature in her varying aspects as
described in the following lines.