Vishnu sahasranamam, slok68

Slok68:         Archishmaa   Archithaha  Kumbho  VishuDdhAtma  VisoDhanaha
                       AniruDdho  AprathiraDhaha  PraDyumnomithavikramaha    

The  Worshipable, the  Worshipped,  The Compact Absolute Pure Atma, the Inscrutable, The Uncontradictable (AniruDdha ), the Unapposable (ApprathiraDhaha ), the PraDyumna, the extraordinary celestial valiant is Sree Maha Vishnu. 

Vishnu  is the Universal Illuminater. The fire in the Sun, the brightness of the Moon, the Gravitational force of attraction of Earth, to be brief, the glow in all luminary bodies of cosmos, is a portion of Vishnu's Brilliance only. 

Vishnu is  nothing but,  " Divine BRILLIANCE ".  Such a Brilliance, which contains  every Pure feature present  in this universe.
When an Entity is Absolutely Pure, Uncomparable , that Divinity , that Supreme Attraction, becomes Adorable. Worshipable. That's why Vishnu is Worshipped ever by everybody.

The  son of Lord Sree Krishna and RukmiNi , was also named "Pradhyumna". He had Vishnu's grace, because,  Krishna resembles Vishnu.

VISHNU,  the  Incomparable,  is the Supreme of all devine entities. 

Om Vishnave namaha