Brahma, Vishnu, Shiva are only three Powers and Personalities of the One Cosmic Godhead. page 390 , Letters on Yoga , volume 22 , SABCL

As for Vishnu being the creator, all the three gods are often spoken of as creating the universe – even Shiva who is by tradition the Destroyer. page 391 , Letters on Yoga , volume 22 , SABCL