Vishnu, they say, is just one of a powerful threesome - the highest lords of the universe. However, though Brahma has created the universe and Shiva can destroy it, it is upto the great god Vishnu to keep all creatures within well and happy. Always compassionate, he is also the wisest of the trinity. It is he who good-naturedly sorts out the mess the others create. And above all, Vishnu always favours the good and the pure.