I do not think that one can talk sensibly of a public and private morality any more than one can of a public or private highway. Morality is a sphere in which there is a public interest and a private interest, often in conflict, and the problem is to reconcile the two. This does not mean that it is impossible to put forward any general statements about how in our society the balance ought to be struck. Such statements cannot of their nature be rigid or precise; they would not be designed to circumscribe the operation of the law making power but to guide those who have to
apply it..

A third elastic principle must be advanced more tentatively. It is that as far as possible privacy should be respected. * * * The police have no more right to trespass than the ordinary citizen has; there is no general right of search; to this extent an Englishman's home is still his castle.