त्वमादिदेवः पुरुषः पुराणस्त्वमस्य विश्वस्य परं निधानम् ।
वेत्तासि वेद्यं च परं च धाम त्वया ततं विश्वमनन्तरूप ।।
Transliteration
tvam ādidevaḥ puruṣaḥ purāṇas-tvam asya viśvasya paraṃ nidhānam |
vettāsi vedyaṃ ca paraṃ ca dhāma tvayā tataṃ viśvam ananta rūpa ||
Translation
You are the primal Lord, the ancient Person, the Supreme Abode of the universe, the knower and that which is to be known, the supreme Goal. By Your infinite form is this universe pervaded.
Purport
This Shloka describes what Arjuna sees and realizes. Shri Krishna's form pervading the entire universe. He could not see either the beginning or the end of Shri Krishna's form.
Overwhelmed with the view Arjuna sings the glory of Shri Krishna and expresses what he realized.
Shri Krishna is the supreme abode of all living beings. After completing the cycles of births every living finally reaches to Shri Krishna. Not only living beings but the entire universe finally merge to Shri Krishna as the end of Kalpa and emits again at the start of Kalpa(Described in chap 9)
Shri Krishna is the supreme truth, all knowledge finally merged to Shri Krishna. He is the omniscient
Arjuna describes all the attributes of God as he witnesses.
