आह च तन्मात्रम् ॥ १६ ॥
āha ca tanmātram || 16 ||
āha—Declares; ca—and; tat-mātram—that (i.e. intelligence) only.
16. And (the scripture) declares (that Brahman is) that (i.e. intelligence) only.
Now what is the nature of that formless Brahman? “As a lump of salt is without interior or exterior, entire, and purely salt in taste, even so is the Self without interior or exterior, entire, and Pure Intelligence alone” (Brih. 4. 5. 13). It is mere intelligence, self-effulgent, homogeneous, and without attributes.