नमः पुरस्तादथ पृष्ठतस्ते नमोऽस्तु ते सर्वत एव सर्व। अनन्तवीर्यामितविक्रमस्त्वं सर्वं समाप्नोषि ततोऽसि सर्वः ॥

namaḥ purastād atha pṛiṣhṭhatas te namo ’stu te sarvata eva sarva ananta-vīryāmita-vikramas tvaṁ sarvaṁ samāpnoṣhi tato ’si sarvaḥ

Prostrate in front of Thee, prostrate behind; Prostrate on every side to Thee, O All. In power boundless, measureless in strength, Thou holdest all: then Thou Thyself art All.

In plain words: Arjuna bows to Krishna in front, behind and on every side. Krishna's power has no limit, he holds everything, so he himself is everything.