There are so many distractions from the faith and in the faith that it is easy to be distracted and get on tangents. There are many false and partial gospels to get caught up in.
Anything that stops short of the conclusion of Gods work in you now, is to be partially saved and held in limbo. Even as Paul said “I seek to lay hold of why Christ laid hold of me”. So we must persist for the same cause lest we fall short of the grace of God. Paul also said “do not let anybody rob you of your reward”. You must learn to apprehend it. To “lay hold” of it.