> 
> Many historians and religious scholars ... attest to the influence of
>  Greek or Platonic philosophy in the development and **acceptance of the
>  Trinity doctrine in the fourth century**. ... the famous Greek
>  philosopher **Plato ... believed in a divine triad of "God, the ideas,
>  [and] the World-Spirit,"**. ([Source](http://www.ucg.ca/booklets/GT/greek-philosophys-influence-trinity-doctrine.asp))
> 
> 
> 

The easiest way to verify the authenticity of this claim would be to check if any of the early church fathers believed in trinity. (Please note by early I mean the <= 300 AD)