A little bit more than twenty years ago, the attention of bioethics community was attracted by the discovery of the work of Fritz Jahr (1895-1953), a theologian and teacher from Halle (Germany), who had conceived both the term and the discipline of bioethics (Bio-Ethik, 1926) by broadening Kant’s categorical imperative onto animals and plants. Today, dozens of papers deal with Jahr’s bioethics ideas, but his work related to other topics remains almost unknown. In the present paper, we address Jahr’s article from 1930, devoted to education ("Gesinnungsdiktatur oder Gedenkfreiheit? Gedanken über eine liberale Gestaltung des Gesinnungsunterrichts" [Dictatorship of worldview or freedom of thought? Considerations on the liberal structuring of teaching of attitudes]). In the article, published in Die neue Erziehung, Jahr advocates a set of ten quite progressive and free-minded principles, including objectivity, pluriperspectivism (verschiedene Gesinnungseinstellungen), tollerant dialogue, autonomy, rationalism, liberalism, and democratization of education system and of the development of worldview at school. We devote particular attention to the comparison of Jahr’s ideas to the doctrine of Pietism and August Hermann Francke, who established the Foundation in which Jahr spent a significant part of his life, first as a student, and later as a teacher.