The Shadow of Gap

I feel in whatever I do and however well I do it, there's a gap. In my mind I see it as a dark shadow between where I stand and where I wish to stand. This dark shadow perhaps hides the depth I will fall in case I try to bridge this gap and fail.
There is light at the side I stand and light at the other side, beyond the gap. That light is definitely brighter and the other side looks more appealing and comforting, yet this gap stands in between, like a black fog, perhaps protecting the other side so that only the worthy and the daring close this gap or get through it.