Karika 38

तन्मात्राण्यविशेषास्तेभ्यो भूतानि पञ्च पञ्चभ्यः। एते स्मृता विशेषाः शान्ता घोराश्च मूढाश्च ॥३८॥

The five not so distinct sensations (tanmātrāṇi) distinguish the five gross elements as peaceful, agitated, and dull, with the aid of memory.

Sensations along with memory help us to distinguish the five elements, and thus the world around us.