G2258 He was [G5713] G3756 not G1565 that G5457 Light G235 , but G2443 was sent to G3140 bear witness [G5661] G4012 of G5457 that Light.
He was not that Light, but was sent to bear witness of that Light.
He was not the Light himself, but came that he might bear witness regarding the Light.
He was not the light, but came that he might bear witness of the light.
He himself wasn’t the light, but his mission was to testify concerning the light.
He was not the Light, but he was to offer testimony about the Light.