The answer to your question would be that what is always true of a thesis statement is that they communicate the main idea. Thesis statements are short statements, which are usually one sentence, that summarize the main idea or claim of a research paper, an essay, etc. Throughout the text, this statement is supported and explained by means of examples and evidence.
It depends on the connotation of the word. a. mentor- helps you shape your future b. dictator- negative connotation, too controlling c. leader- guidance d.teacher- fills your knowledge