A commonplace book: an old-fashioned literary diary for recording interesting items from reading you've done. I use mine to record snippets from reading, conversation and life in general. (The early 2003 entries are from a period some years ago -- before the blog age -- when I tried an online commonplace book as a straight web page.)
Governed, as we are, entirely by public opinion, the utmost care should be taken to preserve the purity of the public mind. Knowledge is power, and truth is knowledge; whoever, therefore, knowingly propagates a prejudice, willfully saps the foundation of his country’s strength.
