Full Idea
Logos was also called 'god' or 'Zeus' by the early Stoics, but they did not think of this deity as a separate being, but as a principle of organization of things. As the soul is the principle of an individual life, so 'god' is the soul of the universe.
Clarification
'Logos' is (roughly) right reason
Gist of Idea
Early Stoics called the logos 'god', meaning not a being, but the principle of the universe
Source
Stoic school (fragments/reports [c.200 BCE]), quoted by A.C. Grayling - What is Good? Ch.3
Book Reference
Grayling,A.C.: 'What is Good? The Best Way to Live' [Phoenix 2003], p.52
A Reaction
This sounds not too far from Spinoza's pantheism. Interestingly, the Stoics were making God more impersonal, and it is Jesus who reverts to the much more popularly appealing personal image.