Security Of The Believer

What is your favorite verse proving that once a person is saved they cannot lose their salvation? Alternatively, is their a verse that sometimes gives you problems in this area? (My logic class is debating this topic in chapel today and tomorrow. Thought you might like to have some input.)

It's Good To Be Saved

Well, let's try something a little different. Since we've somewhat "argued" about Calvinism, Arminianism, and whatever-ism I am, let's share with those who might visit this site what your favorite verse concerning salvation and the security of the believer is. Now, just to be fair, I will not post mine for a day or so. This way it'll give everyone a chance to be first to use a certain verse. So let's go! Don't be shy! Give me your favorite verse!

Maybe I'm Not Naive

Well, now that I've made the Calvinists mad (well, not really...but work with me), let me get the Arminianists stirred up. While I have differing views with the Calvinists concerning "predestination, foreknowledge, etc.," I can say that I appreciate their view on security of the believer (well, at least most of them). While many come to that conclusion through different routes, there is no way that a person who is saved can lose that salvation. It is an impossibility. No where in Scripture do we see an example of someone who is a believer losing their salvation. In fact, according to the words of Christ Himself, He cannot lose them, for only a strong man could take them, and no one is stronger than God. I mean, after all, if eternal life is not "eternal," then what is it?