Vishnu receives liquid of immortality from doctor Dhanvantari. Bas relief. Angkor-wat, Cambodia. Vishnu is the preserver of the universe in the Hindu Trimurti. He is an omniscient being with the powers to support all things with his mind and make the impossible possible. Dhavantari is the doctor of the gods. He provides them with many herbal cures and natural remedies for various illnesses.