The Bitter Earth (Horká hlína) cantata was written in 1960 and it was originally conceived for a mixed choir and organ. The composer soon found, however, that this instrumental accompaniment limited the performance possibilities of the piece to a certain extent and he therefore created a piano transcription of the organ part for a later edition which was printed in 1987. The composition sets to music the verses of Jaroslav Seifert from the collection Turn Out the Lights (Zhasnete svetla) which was written in the period of the nation's peril prior to the Second World War. The genuine and totally non-clichéd patriotism expressed in these texts has long outgrown the historical connection to the moment of their inception and it continues to bear wtness to Seivert's fervent love for this country.