The theatrical heritage of Jan Amos Comenius (1592-1670), the famous Czech teacher, religious thinker, and playwright, has been for a long time underestimated. There is little research on this topic. However, theatre played a very important role within the Pansophic school. The method of theatralisation was not new, but in the age of Comenius it was comparatively poorly spread within Protestant schools. Comenius developed principles of confessional school theatre and drew up dramatic texts that correlated with the study programme. His first plays, "Diogenes Cynicus redivivus sive de compendiose philosophando" (1639) and "Abrahamus Patriarcha scena repraesentatus" (1641), are studied in the following article. The preliminary comparison of the dramas shows that "Abraham" was unfairly shadowed by "Diogenes" in the researchers' eyes. Both texts appear to be of high professional and literary values. Besides, they are closely connected, covering problems of natural (philosophy) and divine (Christian theology) revelation, and dissolving eternal existential problems, such as freedom, the essence of human life, and choice of one's own path. The authors come to the conclusion that the use of theatre in the educational process was an essential part of Comenius' Pansophic pedagogy. Bright images, skilful texts, memorising techniques, pleasure and interest, theory and practice, written and oral world were all combined in the method of theatricalisation.