His memoirs was out a few years ago. Descartes described the essential aspects of his new beliefs in the Discourse of Method, together with a mental autobiography that may explain their genesis and their applications. In his book, he stated that he was taken with her attractiveness. She was a young girl who lived near his home in France. The date was probably around 1645 or 1646. Descartes used these essays as a form of self-therapy - to understand himself better he looked into the causes of his ideas and behaviors, and tried to formulate what ultimately mattered to him so he could live his life accordingly. A good autobiography sentence would be something like "In this essay, I will describe one important change in my thinking about..." Or you can also use it to write about a specific event in your life and say "I will write an essay on how this affected me." These are just examples; you can use them as a guide. As long as your essay is interesting and persuasive, then it should be able to stand on its own as an independent work of art. It's best if you write about events that have some connection to your life today. For example, if you're a teenager, you might want to read some essays by famous authors from long ago. If you can learn from their mistakes and successes, that would be great.