अयं चन्द्रः सर्वेषां भूतानां मध्व् ।अस्य चन्द्रस्य सर्वाणि भूतानि मधु ।यश्चायमस्मिन् चन्द्रे तेजोमयोऽमृतमयः पुरुषो यश्चायमध्यात्मं मानसस्तेजोमयोऽमृतमयः पुरुषोऽयमेव स योऽयमात्मेदममृतम् ।इदं ब्रह्मेदं सर्वम् ॥२,५.७ ॥
In plain words
This moon is the honey of all beings, and all beings are the honey of this moon. And the shining, immortal person who is in this moon, and the shining, immortal person here in the mind — he is this Self. This is the immortal, this is Brahman, this is all.
The commentators
Bṛhadāraṇyakopaniṣadbhāṣyam· bhāṣya
तथा चन्द्रः, अध्यात्मं मानसः ॥
In plain words
It is the same with the moon: within you, its counterpart is simply your mind.
Close to the Sanskrit
So too the moon; with reference to the self, the mental one.