CAN WE LOSE OUR SALVATION?

Several questions were asked in our Quest for Tough Questions that all boiled down to this one question; determined by our Survey to be #3.
Other questions asked included: “Is ‘once saved always saved’ the truth or “once saved always changing” the truth?
“Why can't we just take the chance to live sinful lives for a few years of enjoyment and then get it right with God again before we die?”
“Can I live like hell and then repent later in purgatory?”
Questions like this have been argued about for centuries, with one side saying, “Yes” and the other resounding, “No” with both quoting verses to prove their points.