It's always been my feeling that God lends you your children until they're about eighteen years old. If you haven't made your points with them by then, it's too late.
Bio: Sir James Crichton-Browne MD FRS FRSE was a leading British psychiatrist, neurologist and medical psychologist. He is known for studies on the relationship of mental illness to brain injury and for the development of public health policies in relation to mental health.