Warren E. Burger,
Lemon v. Kurtzman — Opinion of the Court
“ We cannot, however, refuse here to recognize that teachers have a substantially different ideological character from books. In terms of potential for involving some aspect of faith or morals in secular subjects, a textbook's content is ascertainable, but a teacher's handling of a subject is not. We cannot ignore the danger that a teacher under religious control and discipline poses to the separation of the religious from the purely secular aspects of pre-college education. ”
