Note 164 — Front matter (continued 2)
Reading edition
The term Monism, invented by Wolf, originally bore a different meaning from that in which Haeckel employs it. It was used to signify equally the materialistic denial of the substantiality of mind, and the idealistic denial of the substantiality of matter. Professor Haeckel, as will be seen, maintains that mind and matter are but two names for one thing.