 A writer in the United States publication "Orthodox Life" says that ecumenism promotes the idea of a Church comprising all baptized Christians and within which the different confessions are "sister churches".The metaphor of Christianity compared to one body breathing with two lungs was coined by the Russian poet and philosopher Vyacheslav Ivanov, inspired by the worldview of the 19th century Russian philosopher Vladimir Solovyov.Solovyov "felt that eastern Christians could learn from the Western church's relatively active presence in the world."