Article: Use coarse sandpaper moistened slightly with water. Rub this over the geode to sand out any rough patches. Keep sanding the geode until it's as smooth as you want. Be gentle at first and increase pressure as you sand. Some geodes are softer than others, and you want to avoid damage as much as possible. Small bits of stone may fly off your geode while you polish it. Before you start polishing, put on a pair of protective goggles to keep yourself safe. Use a heavier fabric like denim to add a commercial finishing polish to your geode. Rub down the geode gently until it's as shiny as you want. You can buy commercial finishing polish for gems online or at some hardware stores.
Question: What is a summary of what this article is about?
Sand your geodes. Put on protective goggles. Polish your rocks.

A disturbing thought is something that comes into your mind out of nowhere. Disturbing thoughts often focus on violence, sex, and past traumatic events, but they are not limited to these categories alone. Psychologists call these types of thoughts intrusive thoughts because they pop into our heads, often without warning, and cause us distress. Disturbing thoughts can vary greatly from person to person. Some examples of disturbing thoughts include:  Imagining dropping or throwing a baby while you are holding an infant. Even though you would never do this, it is a common intrusive thought. Imagining running over your boss with your car. If your boss has upset you, you may find yourself thinking about something along these lines even though you would never actually do it. Having violent sexual fantasies that arouse you, even if you’d never act on them or want to have these things done to you. Reliving a disturbing experience, such as a car accident or an assault. Many people have disturbing thoughts and are able to let them pass with little additional thought. Even though most of us have these thoughts, some people worry and obsess about thoughts that they would never act on, which can cause them distress. If you are distressed by your disturbing thoughts, try to remember that you are not alone. Many people experience these types of thoughts. In most cases, having a disturbing thought that you know you would never act on is natural and it does not make you a bad person. Often, we have these thoughts because we do not want to act in the way we are imagining. Our minds sometimes wander and consider the worst possible thing that could happen in a given situation.
++++++++++
One-sentence summary --
Understand what a disturbing thought is. Know that disturbing thoughts are common. Know that having disturbing thoughts does not make you a bad person.