Full Idea
Out of the infinite ocean of existence arose Brahma, first-born and foremost among the gods. From him sprang the universe, and he became its protector.
Gist of Idea
Brahma, supreme god and protector of the universe, arose from the ocean of existence
Source
Anon (Upan) (The Upanishads [c.950 BCE], 'Mundaka')
Book Reference
'The Upanishads', ed/tr. Prabhavananda /Manchester [Mentor 1957], p.43
A Reaction
Brahma does not have eternal (or necessary) existence. Could Brahma cease to exist? I suppose we cannot ask what caused the appearance of Brahma? Is it part of a plan, or just luck, or some sort of necessity?