"Look down deep into your soul: do you know, to the marrow of your bones, that if some bad guy came after you or your family, you'd be able to shoot him or her? Repeatedly, if necessary? If you can answer "Yes", then a firearm is probably a good choice for you. If you know you can't, don't buy a gun! Criminals can sense fear and uncertainty; if you hesitate at The Moment of Truth, your gun may be taken away from you and used to prey on other innocent people. Don't buy a gun if you can't or won't use it."
I have heard this line handed out across the counters at gun stores, etc., and as a Certified Personal Protection Instructor, I disagree.
Firearms ownership is about freedom, and about choice. My recommendation is that if an individual is thinking about getting a firearm, he should get the gun and get the training regardless of whether he or she thinks he or she can pull the trigger. Who knows what he will do when the chips are down? If you have the gun and have the training, when the time comes you have a CHOICE. And if you have the tool as well as the knowledge, attitude, and skills that come from training, the choice is yours. Remember, justification arises from the belief that you or another innocent person will die or suffer great bodily harm if you do not use lethat force. So at that last instant, if you are armed, whether or not you shoot is up to you. You can still choose to die (not shoot). If you don't have the gun, you have no choice or control, and you may not have the option of staying alive.
My experience has been that most people who doubt their ability to use lethal force in self defense simply have not had the issues of justification sufficiently explained to them. Once they understand just how narrow and clear-cut it is, the idea of using a firearm in self defense comes easier.
The argument about the perp getting control of the gun is a concern, but it will only happen if you let it. Besides, what a criminal might do with your personal property after he kills you should not be the determining factor in your having "right to choose" in a lethal confrontation. Even if you are one of us who knows he can pull the trigger, the same thing can happen if you hesitate or get caught by surprise, etc.
Although I do not condemn the Second Amendment, there are other "choices" which do not necessitate the use of a gun.