Robin Woods:
I realise everyone is different, and that there will be situational variances, but is it possible to still get lost in chains of thought post 4th path? Or is the mindfulness strong enough to keep neck and neck with what the mind is doing?
Generally speaking, if you have to ask the question, then you haven't arrived.
Mindfulness is EVERYTHING prior to and post 4th path. It
is what keeps you from falling off the wagon, so to speak, by allowing you to be able to maintain control over the emotions, desires, etcetera.
Robin Woods:
I only ask because I'm VERY confused as to where I am on the maps at the moment and had almost an entire day yesterday - with no 'formal' practice - where I didn't get lost in thought hardly at all. Or I very quickly realised what was happening and pulled myself back to the present. Would this kinda thing be possible at the first-path A&P? Or have I somehow managed to 'do what had to be done'?!!!
As to your last question, highly unlikely. But then I do not know you, have never met you, and only know what I know about you based on the information provided in this post. So this is only my best educated guess. All of which means: I could be wrong. (In other words, asking such things on the Internet is certainly not the best place or environment to ask. You need to deal with people who KNOW you when asking such things.)
However, keep observing your experience, and if after one year, two years, three years your experience remains the same, then perhaps you
have "done what had to be done." After I got to the point where studying more Dhamma seemed pointlessly repetitive, and I was able to generally maintain control over the mind, I found it difficult to believe that I had accomplished anything profound. Except as time went on, I gradually came to accept that perhaps I
had accomplished what I set out to accomplish.
It is one thing to awaken to
anicca, dukkha, and
anatta. It is another thing to be able to maintain that awakening when it COUNTS. Like: in each and every present moment in succession.