The C-Word

I haven't blogged much lately because I am now kinda fearful. I never thought much about that C-word, you know, the one that protects the contents of a book, paper, story, song, etc, from wrongful use. I won't type it because it might trigger a tag and someone will get on my blog and find my quotes from other sources. I didn't know the Bible has a C-word. How does one publisher know you quoted from his and not some other publisher's version? When I use definitions of words am I stealing someone's work? Beats me.........................