If you don't find some sort of meaning in the Bible, how are you Christian? It is an attempt to present that meaning.
@FireDragon76 it is similar to how people will quote studies or say Science as if to settle a matter. Any such only works if both sides agree axiomatically or consider the appeal to authority a valid one. In Western Civilisation we can traditionally look to the Scientific Method and the deep cultural Biblical influence as common ground, even if the dialogue is with an atheist. The problem is the knee-jerk rejection of the Biblical meaning that has taken hold amongst some moderns, as even if you don't believe it, it has been believed and acted as a cornerstone for wisdom and meaning for millenia amongst Westerners. That we even need to defend the Bible as culturally influential in informing our opinions or moralities or societies seem silly to me. If I argue with a Buddhist or Muslim or such, I am going to seriously take a look at what his sutras or the Koran says. Using it within a dialogue or argument is not wrong. I mean, I can use a fable of Aesop or mythology if I need to, depending on the context, if I need to bring certain images or common ideas across. We have a shared unconscious or conscious store of imagery, you know like Jungian archetypes or deep correspondances in myth or story, to draw from - and the Bible is a strong expression of such shared human imagery.
To dismiss something on account of its source, rather than attend to what it says or its point, is the fallacy of Bulverism. I am sorry if non-Christians are irritated by the Bible quoting, but it would be a poor example of a Christian that never does so, and indicative of reticence to dialogue on the others' part if that results in the breakdown of the discussion. Full on Bible-thumping sermonising I understand, as we need to work down to some form of axiomatic ground before scaling the other's peak, but the Bible will need to be quoted in any sort of religious discussion at some point - else rather just wash the dust from your feet and move on.