Johannes Amos Comenius, trained in theology at Herborn and Heidelberg, was not primarily a biblical scholar. His key biblical work is the Manualník, an abridged Bible he edited twice—first in 1623 as a Bohemian manuscript, then in 1658 in Amsterdam for exiles after Leszno's burning. This abridgment raises theological questions: how to justify and approach shortening Scripture without distorting it? Comenius tackled this by modifying the Kralice Bible, especially Genesis and Exodus, later reverting to the canonical text in print. This paper explores these theological implications.