Does the truth really matter? For most religious organizations, including Christian truth seems to be very important, but the fact is not.
In other words, if Christians can prove something, they will talk about it forever, but if they can not provide scientific evidence satisfactory to support the statements made by the Bible or Christian organization they belong to, you will rarely hear it mentioned again. You can get more information about the bc and ad timeline via online sources.
Always establish the facts first. This should not be taken lightly and if you're seriously interested in studying Christianity and the Bible, it will need to be a priority for your Bible study group.
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If someone asks a question and the other members of the Bible study group answered questions without establishing the facts first, you do not need to persecute that individual, but make it known that this group only the opinions of this and nothing more.
Do not let someone in a Bible study group mislead others. One of the biggest problems in the churches today is the misuse or manipulation of the Bible verses and then to let the leaders of this church know that you have had enough and will not take it anymore.
If the Bible study group was talking about an individual Bible verse or chapter of the Bible, it would not be a bad idea to read the Bible chapter or verse of individuals at least three times before learning or speculate.