4. The State's claim that it is empowered, as parens patriae, to extend the benefit of secondary education to children regardless of the wishes of their parents cannot be sustained against a free exercise claim of the nature revealed by this record, for the Amish have introduced convincing evidence that accommodating their religious objections by forgoing one or two additional years of compulsory education will not impair the physical or mental health of the child, or result in an inability to be self-supporting or to discharge the duties and responsibilities of citizenship, or in any other way materially detract from the welfare of society. Pp. 229-234.