Vishnu sahasranamam, slok74

Slok74:         Manojava Stheerdhakaro  Vasuretha  VasupraDaha
                       VasupraDo VAsuDevo Vasurvasumanaa Havihi

The one with the speed of Mind, the Giver of water, the Devine Light, the
Life giver, the Devine Presence resting in living beings, the Devine Glory,  andthe Mind Product of living beings (thought), is Sree Maha Vishnu.

This slok speaks about the "Universal Mind" and  the "Life Force"
( PrANa Sakthi ).
The Supreme Universal Mind can appear anywhere, in the universe at any time, taking any form according to it's wish. Hence, the speed of Vishnu is described as the speed of Mind. How can any form be taken? The" DEVINE  Illusion "( Yoga Maya ), a compound of thriguNas and five elements, which is hiding the Real PICTURE OF THE UNIVERSE, helps the Supreme Mind, in taking a physical form. So, in no time, Vishnu presents himself anywhere.

Vasu means Life.  Vishnu is the Life in living beings, named as VAsuDev.
When inside the human, Vishnu acts as the light of life, unattached administrator, Vasudeva. Once again, VISHNU is depicted as Light, spiritual in nature. VasuDeva remains a spectator inside the body, unadhering like sky,
while Sustaining the PRANA Shakti. Vishnu is the sustainor of the universe, whereas VAsuDeva is the sustainer of the living.  The physical format of
VAsuDeva is same as of Vishnu, the golden hued brillience.

In the previous slokas, VISHNU is described as everything in the universe.
Hence, naturally, five elements, mind, consciousness, intelligence and life (jeeva) are all Vishnu's dispositions only.

Om Vishnave namaha