Mantra 3

येन रूपं रसं गन्धं शब्दान्स्पर्शांश्च मैथुनान् ।एतेनैव विजानाति किमत्र परिशिष्यते ॥एतद्वै तत् ॥ ३ ॥

In plain words

That by which one perceives form, taste, smell, sounds, touches, and sexual pleasures -- by this very [Self] one knows. What, then, is left here unknown? This, verily, is That.