Demean thyself more warily in thy study than in the street. If thy public actions have a hundred witnesses, thy private have a thousand. The multitude looks but upon thy actions; thy conscience looks into them: the multitude may chance to excuse thee, if not acquit thee; thy conscience will accuse thee, if not condemn thee.

Enchiridion Institutions, Essays and Maxims, political, moral & divine. Divided into four centuries. By Francis Quarles (ed. 1844)