I wonder

I wonder why life is a quest with unfulfilled dreams and unanswered questions...
There is no specific guide no specific mentor. I have absolutely nobody to call my own
The wonders of the universe try to open my mind but i am closed shut to the impossible
I am happy to dwell in the past and fear for my future, weird considering that i was always adventurous.
I dont known when exactly i went from adventurous to the cautious. Its not a change i expected in my self. Is it a part of my growing up? If this is maturity then i rather be immature