In Western countries when someone sees the cover of a book like Krsna, he immediately asks, "Who is Krishna? Who is the girl with Krishna?" etc.
The immediate answer is that Krishna is the Supreme Personality of Godhead. How is that? Because Krishna has all the qualities of the Supreme Personality of Godhead.
One who is in possession of all the six opulence:
1) wealth
2) power
3) fame
4) beauty
5) wisdom
6) renunciation of these opulence
Krishna possesses these qualities to an unlimited degree. This clearly proves that Krishna is the Supreme Personality of Godhead.
Śrī Brahma-saṁhitā 5.1
īśvaraḥ paramaḥ kṛṣṇaḥ
sac-cid-ānanda-vigrahaḥ
anādir ādir govindaḥ
sarva-kāraṇa-kāraṇam
ईश्वरः परमः कृष्णः सचिदानान्द्विग्रह:
अनादिर आदिर गोविन्दः सर्व कारण कारणं
Word for word:
Translation:
So Let's Serve the supreme personality of godhead krishna and pay our obeisance's to such an Infinite God