: a feeling of being sure that someone or something exists or that something is true
: a feeling that something is good, right, or valuable
: a feeling of trust in the worth or ability of someone
While many of us have strong beliefs, myself included, we must recognize that just because we believe something to be true, without evidence of that truth, what we believe remains conjecture.
The problem with religious beliefs based upon a religious text is that to use that religious text as supporting evidence that ones belief is valid the other parties involved must accept that the text is true and accurate, that it is acceptable evidence.
Quite often the Bible is used as supporting evidence. The problems that I have with this is that the Bible was written by men, has been translated many times and even when an individual tries not to put his own "spin" on the interpretation unconsciously that "spin" does occur not to mention those who would deliberately change an interpretation to suit their agenda.
The evidence has not shown the Bible to be the word of God and even though some of the history in the Bible may correspond to an actual event, that does not mean that the entire text is evidentiary.
When discussing in various forums ones opinions on a topic it is perfectly fine to declare ones position based upon ones beliefs and we should all respect ones right to hold those beliefs, but it is not appropriate to accuse or denigrate others for not having the same belief.
We all have the right to believe or not believe as we so choose. Who is to say who is right and who is wrong without supporting evidence? If we do not permit others to hold their own beliefs what right do we have to our own?