AustLit

'The plot centres on the well-known sentiment, 'To err is human; to forgive, divine.' The play cannot be accused of any lack of humanity. It tells of a girl who loved unwisely. It tells, too, of the handsome lover who smiled, and passed on, and forgot. Then there is a wife who blighted her own life by effecting a divorce from a man she loved; and, lastly, there is the dainty, nameless girl who proved that every father should know and love, and do justice to, his child. This is a film with a purpose, and it holds through its human appeal and entertainment value. [...] Would it be possible, do you think, for any man to fall in love with his own daughter ? And, knowing the girl of his heart to be such, what would a real man do? Ray Stanford, in Know Thy Child, answers both questions satisfactorily.'

Source:

'Know Thy Child: Fine Australian Photoplay', Sunday Times, 9 October 1921, p.3. (Via Trove Australia)