This is the third line of apologetics, discussion, exchanges of ideas about the Baha'i Faith between a Baha'i who joined this Movement 45 years ago in 1959, a Movement which claims to be the emerging world religion on the planet, and others mainly an inquirer named 'Unconvinced' and another chap named 'Javaro.' :evil:
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After a series of exchanges of ideas and information about the Baha'i Faith with 'Unconvinced' let me suggest:
(i) you try some of the Baha'i sites which go into many aspects of this Faith in exhaustive detail (bahai.org, Plant Bahai, bahaindex.com, Bahai Academic Resources Library and others); and
(ii) that what you say about many people claiming "to communicate with the creator" is so very true. But (a) hardly any write about their communication in extensive prose and it is rare, if not unique, for those who do to do so in 40,000 pages of beautiful and coherent prose; (b) for those who do write their communicate down it is rare for them to have 5 million followers after 150 years; (c) the answer to your question in all the relevant aspects it raises is really multi-factorial and would require a more lengthy reply than I am giving it here to be comprehensive.
What makes anyone's claim to anything true requires of the investigator the interest to investigate, the openness to respond and the capacity to understand. There is also required some line of authority and knowledge in any discipline of study: chemistry, physics and indeed in the social sciences. I don't mean to imply the process is simple, although it can be. Anyway, I leave this with you and your cogitations and wish you pleasant travelling in the fields of apologetics.