I have found it ironic the way that I deal with the issue of eternal security. I find that when I have commited sin that is bringing me guilt and I am struggling to repent it is in those times when I sruggle with eternal security the most. In the times when things seem to be going well and I have my flesh in submission it is then that I am confident in eternal security. I say this is ironic because typically people on the non eternal security side will view this doctrine as a liscense to sin, and therefore not of God. You would think that when a believer was in sin, or struggling with sin, that they would cling to this doctrine. I have found the opposite to be true. When we are in sin we tend to doubt the infinite forgiveness which is in Christ of all sin, and we begin to believe that even after being justified in someway we must do something to obtain forgiveness. This of course is false, we are saved by grace, not of our own actions. That fact never changes, grace is given not earned, nor diligently kept, it is freely given. Still sin, when it takes occasion in us, brings us to the point where we even doubt the grace we have been given, and our natural response is to seek some sort of work of obedience to bring us back to a right standing with God. We are like dogs returning to our vomit, we once lived believing that we were good enough to get into heaven, and now we fall back into thinking we must be good enough to get into heaven. I am not sure what the answer is for us as believers. It is hard to remember when we sin, that we are redeemed, and that we must simply turn from the sin and keep marching on toward eternity. There is no need to question your eternal destiny, it is a waste of time, emotion, and energy, the battle has been one already, simply move on and continue in grace.