. . . (skeptics) evidence must be objective. It must be independent of the preconception of the experimenter. In chemistry, the litmus test fulfills these criteria. No matter what the experimenter “believes”, the test will prove the alkalinity or acidity of the solution. Important disclaimer: I do not say that physics or chemistry could be used to verify religious claims. But the method must correspond to these methods. . . .
Actually, knowledge is all about preconceptions.
Thinking about what it means for something to be considered objective the evidence. Clearly the object has to be discerned in accordance to what one believes to be the objective world.
One must have a theoretical framework in order to detect and understand an event or process.
Your example of a litmus test is in fact an example of how it is necessary.
We must understand the processes that are at work when the paper turns pink or blue.
Staying with the field of chemistry, we not that long ago thought in terms of the phlogiston.
We went on to formulate the ideas of atoms and elements such as oxygen are much better at explaining combustion.
As part of an ongoing process of aquiring knowledge of the material world, more comprehensive understandings about the behaviour of matter were developed along with concepts regarding molecular architecture, subatomic constituents, etc.
What we see happening over time is the failure of a current theory to explain what is being observed, being supplanted by one which is different or more comprehensive.
What I am trying to get at is that you need to know at least the possibility of something before you can find it.
As you rightly state, if one is attempting to understand the totality of existence, which includes the Divine, the physical sciences will fail in their capacity to explain it all.
There would be many reasons why an individual might see only the mundane.
It is partially a result of the person’s own doing; i.e. failing to lift one’s eyes.
God also turns His face away. He does this I would surmise to protect us given that most of us want to possess knowledge.
Fact is that we don’t need to know how it all works to be good persons, which is the whole point of all this.
The other aspect to this has to do with the fact that while the knowledge, more or less exists within us, it is gained when we surrender to it.
With respect to religion, it is in giving oneself to God, that one comes to know Him.
The problem is that the sacred is very powerful stuff. It will destroy the unprepared.
Imho, better a Pallas who growls on the forums, than one beating on my door, trying to shove his beliefs down my throat.
Sorry for any typos and incoherence,; had to write and run.