Is there ever a point in which a person can no longer be saved? If so what is it?

I think this question is very interesting. When I thought about it at first, I thought that people will always be able to change and maybe someone who thinks that is right, but the more I thought about it the more I realized that I believe there are probably points in which a person can no longer be saved. Maybe it's a belief that can't be changed, or maybe it maybe some action, but I think that there is probably a point where a person is forever beyond saving and I thought that it would be interesting to discuss that on this sub.<br><br><br>Edit: I probably used the wrong words here. Its more like at what point can a person no longer change themselves into a better person, for example if a person is sociopathic, or psychopathic, are they forever doomed to be like that?