The sustainer of the universe, the sustaining principle (Sthiti).
Vishnu is one of the cosmit Trimurti Brahma – Vishnu – Shiva. Creation – Preservation – Dissolution. Srishti – Sthiti – Laya.
He rests on the world-serpent Shesha as Narayana. He is depicted dark-blue, like the raincloud or the sapphire.
Vishnu incarnated tem times on earth.
See also Vishnu’s insignia.
Read Vishnu Sahasranam- Vishnu’s thousand names