A person's cognition guides his behavior, which in turn determines the direction of his life. Most of the pain in the workplace comes from cognitive limitations.
Women who suffer from mania often have extremely strong personalities, so strong women are very likely to suffer from mania.
In fact, many times we are not frustrated because of our lack of ability, but for other reasons.
The main reason why we get nervous is that we don't anticipate and prepare for the occasion and the content of the speech.