„There is no God-Creator, but there is the Cosmos, which creates suns, planets and living beings. There is no omnipotent God, but there is the Universe, which governs the fates of all celestial bodies and their inhabitants. There are no sons of God, but there are mature and thus rational and perfect sons of the Cosmos. There are no personal gods, but there are elected leaders of planets, solar systems, stellar groups, milky ways, islands of ether and the whole Cosmos. There is no Christ, but there is a brilliant man and a greater teacher of mankind.“
— Konstantin Tsiolkovsky
from Нет ничего (Мысли безбожника) [There is nothing (Atheist's thoughts)], quoted in Л.В. Шапошникова, Вестники космической эволюции.