I think there are so many ways to become interested in music. I believe signs of sustained interest gives a sense of the right time. Music if thought of as a language would perhaps indicate that as early as possible is not so bad. I do believe that a really nurturing first teacher that makes the child love something is crucial.
A man may speak very well in the House of Commons and fail very completely in the House of Lords. There are two distinct styles requisite: I intend in the course of my career if I have time to give a specimen of both.