I am but another person, but I am enough

Is it possible for one human to make a lasting impact Alice? Is it ludicrous to even consider the possibility that down the line what I do can positively change the situation for the downtrodden, the underrepresented and the unwanted? 

“I am only one,
But still I am one.
I cannot do everything,
But still I can do something;
And because I cannot do everything,
I will not refuse to do the something that I can do.” - Edwin Osgood Grover

The concern isn't really about what can or cannot be done, it is more around whether I have the willpower to stand through my conviction in tough times? Do I believe in anything strongly enough to stand by it even when the rest of the world is opposing me? Do I believe in my ideas strongly enough to stand by it even when nobody agrees with me? When the world around me is crumbling down? When my staunchest supporters become the loudest detractors?

To be honest, that scares me big time. To not be able to stand strong at the time of opposition is something that makes me reconsider even beginning to make a change, trying to make a stand. Fear of failure should not be a deterrent as it is only natural to go through ups and downs but I fear loss of conviction and self belief because I know for a fact that if I lose my conviction, the entire world around me will fall apart.

I hope I can find that cause that I can stand by, in good times and bad. Truthfully, no such thing exists in the world and I hope that pretty soon, I can come to terms with the uncertainty that is life and start rolling the dice, leaving the comfort of a steady dead-end corporate world to make a difference. But once again, I am scared of thinking of the very real possibility wherein I lose the vigour and motivation mid-way. It has happened before and mostly the trend seems to be of the fact that I am only interested in things that aren't available to me and once they become easily available, I lose steam. I am unable to take it to new heights. I can only be the underdog but I cannot maintain a lead or lead they way to new horizons. I get sloppy.

Ah Alice, what a real pickle it is to be full of ideas but none of the conviction required!