Stability

Below is a quote from The Subversion of Christianity by Jacques Ellul that I found interesting:

I am saved by grace, agreed. But once this is done, it is done, is it not? I enter into a stable, solid state that is foreseeable and unchangeable. But lo! in salvation as in faith or freedom, I do not enter a fixed state. Salvation is not a finished thing. I never hold it. I never own it. It is not an acquired situation. I may lose it (Paul himself tells us so). Nothing is ever finished with God. I am never installed.