This is a serious problem if one has a desire to know God exists, objectively.
For anyone who has any desire to know for a fact God exists, that is, to know He exists with as much certainty that one knows the sky is blue, or that the sun rises in the east, or that table salt is composed of sodium and chlorine, one must first want to know "what is truth".
Without such a desire, then everything becomes relative, even, the color of the sky, the direction of the sunrise, and the chemical composition of table salt. It's all relative, without an understanding of truth.
It doesn’t really matter if I know God exists, does it? Does it actually change anything? Some atheists claim to know God doesn’t exist...what color do you think they see the sky as, or where the sun comes up?