Name and Form
The world is differentiated only by name and form.
Nama-rupa (name and form) is how the one Brahman appears as many things. Like clay appearing as various pots, Brahman appears as the world through name and form.
All modification is but name based on speech. The reality is clay alone.
Name and form are superimposed on the nameless and formless.
Chandogya Upanishad