from Монизм Вселенной ("Monism of the Universe"), 1931(?) (= "The Cosmic Philosophy", 1932 ?)
Original text (Russian)
Original text (Russian)
A planet is the cradle of mind, but one cannot live in a cradle forever.
Планета есть колыбель разума, но нельзя вечно жить в колыбели
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