...because first a person must have a real understanding of the living God...
How is that even possible? What can be the source of such understanding? How can man understand something that far exceeds any capacity to understand something that defies everything that is observable and measurable?
That is done by changing the criteria.
We need only go by the observable and measurable and exclude whatever is not.
It is fine to view religions as wrong and religions as evil and etc etc, but the questions about God are (or can be) separated from the organized religions.
Albert Einstein said it this way = "Science without Religion Is Lame, Religion without Science Is Blind"
But Einstein worded that incorrectly and it haunted him ever after.
A correct wording would go like this = Science without God Is Lame, and viewing God without Science Is Blind.
Religion is a different subject then is God, and science is correct to reject the popular religions but NOT to reject God.
When Einstein spoke then many people jumped onto his words by saying it meant that they need to accept Jesus as their personal savior - and that was never what Einstein meant as Einstein saw a science based God but he could not get people to separate the science from their ideas about religion.
The real God does not "defies everything that is observable and measurable".
Our own understanding about life and about God must come from our self and within our self, based on everything that is observable and measurable.
Anyone can know that there are Ghosts and spirits and Demons because with very little effort then anyone can experience such things in vivid details.
There is science like the "Big Bang" which is a proof of a real creation day where life sprang from nothing, and THAT is a huge proof of the real Creator.
There is also Bible prophesy which simply can not be faked, link one here =
US & Britain in Prophesy.
And there are lots more ways which are observable and measurable, and every person is quite capable of understanding because it is NOT out of our reach.