Thread: find nonletter characters

I have a large document, and I'm looking for each line that contains a non-letter character. Trust that my method of getting each line's string is correct:

while (hasNextLine()) {
    String line = nextLine();
    linesearch:
    for (int i = 0; i < line.length(); i++) {
        if(!Character.isLetter(line.charAt(i))) {
            System.out.println(line);
            break linesearch;
        }
    }
}

This code doesn't work. It prints out every line in the document. I thought that the if statement would only print out the lines that contain a non-letter character, and then escape that line. What am I missing?
Thanks

Ah yes, each line contains spaces. Sorry about that. Thanks.