Почему в русской церкви не принято сидеть во время службы?
A major difference of traditional Orthodox churches from Western churches is the absence of any pews in the nave. In some ethnic traditions of Orthodoxy, it was deemed disrespectful to sit during sermons. However, in some churches in the West and particularly in the diaspora churches in the United States, pews and kneelers were introduced, under the influence of other Christian denominations.
it was deemed disrespectful to sit during sermons