Our ability to respond to danger has been important for survival, so feeling worried in uncertain situations is normal. Feelings of worry, which are activated in anticipation of future events, are often experienced in everyday situations. For example, we may feel nervous imagining unlikely events, such as a computer crashing during an important presentation. To some extent, thinking through potential scenarios can be helpful. When our worries exceed our control, however, they cause us unnecessary suffering. Consider how many times you have lost sleep thinking about a terrible situation, which, in the end, did not actually take place. If that situation actually occurred, it only goes to show that worrying about it did nothing to prevent it from happening. It is worth making a conscious effort, then, to stop worrying endlessly about events you may not experience.