Basically, this quote means that you should do what's best for you even if the choices you make might hurt someone else. It also states that you need to do things that are in your best interest, even if they hurt and are painful because at the end of the day you are the most important person and you deserve to be happy.
When writing an essay you first want to start off by choosing your topic.
Secondly, you should brainstorm on a piece of paper so you have your ideas together and organized.
Then you should begin by writing your thesis statement and main ideas in the first paragraph.
After that you should have at least 2-3 body paragraphs explaining each main idea topic you wrote in the previous paragraph.
Finally you should end with your conclusion paragraph, briefly summarizing everything you talked about in your essay.
* As always look over it a few times and make any adjustments *
While Lady Crawford was in the hospital, she emailed Ms. White.
Lady Crawford, while in the hospital, emailed Ms. White.
While overseas on deployment, Tidus reported to his supervisor.
Tidus reported to his supervisor when overseas on deployment.
While Mariah was on vacation, Sarah offered to clean her apartment.
Sarah, while Mariah was on vacation, offered to clean her apartment.
Since Beth had lost her watch, she and Melissa were both late.
Melissa and Beth were both late, since Beth had lost her watch.