The Call

I should be doing something, but am not sure what it is and where to start. So I get involved in all kinds of small projects, initiate this and that, but always keep some distance. Because the thing is, I have not quite yet found the moment that would trigger my transformation, that would kick start me on my journey to....not sure where to.
I am no Susan Boyle on XY's got talent, I am no mum who realised that her kid did not fit in the conventional education institution and thus opened an alternative school, I am also no Stephen Hawking not being able to really speak and yet showing humanity new dimensions of knowledge. I feel I should go out there and seize the opportunity. But as soon as I take the first step, I become unsure of my true deep passion for what I want to do. Or...does this true deep passion matter at all? I have already felt is maybe too many times and forgot which one was the greatest and the lasting one...
I really need to discover my "way of expressing" myself, even though it won't be singing, painting or playing an instrument...There is too much locked inside of us, I really admire people who can let it out...
And in the meanwhile I'll wait for that moment, that call, when I just look around and start seeing the connections, the interlinkedness of all that has always been there, but I have been oblivious to.
What is it that helps you express yourself? And have you had the "enlightning moment"? What changed afterwards?