This feeling can be colored by fear, dread, can feel like anxiety, but at the root of most fear is a sense that you are insufficient for the task that is in front of you.
Not big enough, not smart enough, not fast enough… Not enough = insufficient.
Now, for most people, feeling this is all they need to run for the hills.
For some people, they can hang in there, waiting for the feeling to subside.
For some people, unless they feel up to the task, they won’t even start.
For me: I know that unless I feel that and go beyond it, doing what I don’t feel I can, several times a