Vita-man, those are my thoughts, too. In fact, one of my teachers used to regularly tell us, We are all beginners...at the stage we're in now.
If enlightenment were like a university, the diploma doesn't mean we've mastered all there is to know about the field: when we take that first job after graduation, we're mere beginners. Some will learn lots more on the job, and some will go on to gather still more education, including another degree or two.
It is our nature to grow spiritually. I don't think there are any limits.
