Hello Yep .
From time to time that thought crosses my mind , and some times more frequently and emphasis than I care for . But its all better , It used to be all day everyday , and I always "thought" I had an answer , (usually to my liking ) , and , needless to say , it always led me to one "failure" , so to speak , to another , one disappointment to another , but it wasn't until I totally surrendered my will and my life to the care of God , that I finally realized (made real) my purpose of being here (on this ball of dirt) as you put it , (though i dislike the term , for God doesn't make dirt) .
I was absolutely clueless , in fact everyone who knew me tagged me with a nickname of " rebel without a clue " though I always thought "I got handle on everything and everyone ".
We cannot (CANNOT!) predict our purpose.
In my case that is absolutely right , that is why first thing in the morning before I even think of taking another breath , I get down on my knees , and confirm to Him the fact that I am still a sinner (for I dont know what kind of "thoughts" ran through my head , or what kind of grip satan had on me while sleeping [he only gets you when not looking you know] ) and ask Him for forgiveness , and then I go on asking Him to remind me of His presence and guidance throughout the day , and I go about giving it my 100% in everything I do , for I know I'm under a Watchful Eye . When I end up having a not so good of a day , I know its me , and when I have a better day , I know Its Him , so I try to repeat that one , so far , doing so , never had a "bad" day so to speak (it just didnt go my way) only good and better days .
Like the quotations MLG used , my only purpose is to establish a closer relationship with Him so that in doing so I will glorify Him even more , and that's a continuous , day to day process .