Our part as felt by me through the filtering of all the information that I have gathered,over the course of my life so far, was the do exactly what you are now also trying to do, which is find out, to the best , most sincere of our ability, what our part truly is.
There is a natural and instinctive search which takes place in every human individual existence. At an age of accountability , our choices becomes more influenced because of curiosity and exposure, this I believe is where the wisdom or damnation begins on many fronts, depending on the environment you are in.
Since we met two profound entities here, we tend to make our choices based on those , the are called good and evil.
How we grow to interpret those two, and what convictions we feel will eventually be put to the test by the level of your intellect.
Once you have witnessed and experienced both the choice is on you based on the convictions you feel.
It is obvious that we were given life and so many don't believe we were given any guidelines, but asking your self why you do what you do, you should find buried answers,same as you find buried answers for pain and death.
We will be judged by our own convictions even by our own selves.