The Presence of the Dead on the Spiritual Path

If materialist views continue to persist for several generations more, the red of roses will really disappear. People will actually see little gray atoms vibrating as an atomic whirl, not because they have to see them or because they exist, but because they will have trained themselves to see them. That is why it is necessary to spread spiritual science, to prevent having to live in a future filled with nothing other than physical atoms swirling around.