by the Fourteenth Amendment. "No State shall . . . deprive any person of life, liberty, or property, without due process of law."
While this Court has not attempted to define with exactness the liberty thus guaranteed, the term has received much consideration and some of the included things have been definitely stated. Without doubt, it denotes not merely freedom from bodily restraint but also the right of the individual to contract, to engage in any of the common occupations of life, to acquire useful knowledge, to marry, establish a home and bring up children, to worship God according to the dictates of his own conscience, and generally to enjoy those privileges long recognized at common law as essential to the orderly pursuit of happiness by free men. . . . The established doctrine is that this liberty may not be interfered with, under the guise of protecting the public interest, by legislative action which is arbitrary or without reasonable relation to some purpose within the competency of the State to effect. Determination by the legislature of what constitutes proper exercise of police power is not final or conclusive but is subject to supervision by the courts. Lawton v. Steele, 152 U.S. 133, 137. . . .
Practically, education of the young is only possible in schools conducted by especially qualified persons who devote themselves thereto. The calling always has been regarded as useful and honorable, essential, indeed, to the public welfare. Mere knowledge of the German language cannot reasonably be regarded as harmful. Heretofore it has been commonly looked upon as helpful and desirable. Plaintiff in error taught this language in school as part of his occupation. His right thus to teach and the right of parents to engage him so to instruct their children, we think, are within the liberty of the Amendment.
The challenged statute forbids the teaching in school of any subject except in English; also the teaching of any other language until the pupil has attained and successfully passed the eighth grade, which is not usually accomplished before the age of twelve. The Supreme Court of the State has held that "the so-called ancient or dead languages" are not "within the spirit or the purpose of the act." . . . Latin, Greek, Hebrew are not proscribed; but German, French, Spanish, Italian and every other alien speech are within the ban. Evidently the legislature has attempted materially to interfere with the calling of modern language teachers, with the opportunities of pupils to acquire knowledge, and with the power of parents to control the education of their own. . . .
That the State may do much, go very far, indeed, in order to improve the equality of its citizens, physically, mentally and morally, is clear; but the individual has certain fundamental rights which must be respected. The protection of the Constitution extends to all, to those who speak other languages as well as to those born with English on the tongue. Perhaps it would be highly advantageous if all had ready understanding of our ordinary speech, but this cannot be coerced by methods which conflict with the Constitution -- a desirable end cannot be promoted by prohibited means. . . .
The desire of the legislature to foster a homogeneous people with American ideals prepared readily to understand current discussions of civic matters is easy to appreciate. Unfortunate experiences during the late war and aversion toward every characteristic of truculent adversaries were certainly enough to quicken that aspiration. But the means adopted, we think, exceed the limitations upon the power of the State and conflict with rights assured to plaintiff in error. The interference is plain