Religious experience
The spiritualist who sincerely claims to be able to see auras may well be able to experience them. But as long as that experience is not objectively verifiable by others it will remain a religious or mystical experience unique to them.
It is the same with any awareness of God or the Divine[1]. Much as you may want to share it with those around you, you cannot.
Temporal knowledge advances through the repeated testing of hypotheses. We grope in the dark, never sure, advancing tentatively. “Scientific proof” is a contradiction in terms. In science we can never prove anything absolutely, only disprove or increase the probability of the validity of a hypothesis. Newton gave way to Einstein. For most practical purposes Newton’s gravitational theory remains valid, but at the extreme boundaries Einstein’s theory better predicts what may be observed.
The advance of worldly knowledge[2] is founded on observations that are repeatable by different individuals at will.
Religious or mystical experiences are not repeatable at will, nor objectively verifiable and measurable. You can share any truths or ideas associated with your spiritual awareness. You can convey your conviction and sincerity. But you cannot make another who has not had your religious experience believe as you do.
This does not mean that religious experience is not real or valuable. All we can assert is that religious experience is of a different reality and is not directly shareable.
Any relationship you may have with God or the Divine is personal, private, and mystical.