Heaven is now the believer's native country. Here he is out of his proper place. We are exiles in spirit while at home here in the body. We will not be truly at home until we reach the land we can't now see. We are living paradoxes and contradictions and thus it is no wonder that men of this world cannot understand us --- we hardly know ourselves.
Google is scanning in thousands of books from approximately 10 major libraries including UVa, Harvard, a major British Library, and the New York Public Library. Many of these works are collections of sermons from the 1800s and anthologies of sermons from the 1700s. There are gems awaiting your discovery. Many are available as .PDF downloads if they are in the public domain, as most sermon collections are.
This link will take you to the "Advanced Search" page of Google Book Search: http://books.google.com
Or, just search by words or phrases like you would "google" anything. The real gem I used for this post came up when I asked for a search on "Thomas Manton." Enjoy.