There is really so much uncertainty in life, at least my life–the life of a person at the beginning of their career. Perhaps everyone feels it, regardless of the what stage of their career they are in. But in my limited perspective, I’m only willing to confine it to this particular stage of life.
The uncertainty, as I see it, is that of, “will this work?”
And I can guess and run the problem over and over again in my head, but there is really no telling until I try.