Your mother may have told you it was good manners to look other people in the eyes while speaking to them, but it also helps attach an additional air of confidence to your words.  Like an animal asserting authority in the wild, stand tall and directly face those whom you intend to lead.  If you are giving a presentation, for example, assume the “power position” at the start — stand in front of the podium, directly facing the audience and making eye contact throughout the room.  If you are going through slides, don’t get caught facing the screen or standing perpendicular to both screen and audience the whole time.  Face the people and look at them whenever possible. You don’t need to intensely stare at someone while speaking to him/her.  But return your gaze regularly to the person, and try not to look down at all while talking. Being confident and sounding confident are not always one and the same.  Some people may be bursting with confidence in their authority, and yet the way they speak gives away this entire advantage.  Once you feel authoritative, make sure you sound that way as well.  Don’t go to ridiculous lengths to deepen your voice, but adding just a bit more depth can help make what you say sound more authoritative. Practice not allowing your voice to trail off at the end of a sentence.  Some people tend to raise their voice inflection at the end of every sentence, making even declarative statements sound like questions.  Don’t let it seem like you doubt what you’re saying. Some people feel like silence is a sign of weakness, and want to fill any gaps by talking.  Prattling on, however, is more likely to be taken as a lack of seriousness or certainty.  Taking time to think through what you want to say, and using pauses and silence for effect while speaking, helps to bestow authority to your speech.  Always think through what you want to say before speaking.  Even when you’re “on the spot,” take a couple seconds to gather your thoughts before you begin.  That small period of silence will demonstrate that you are serious about addressing the topic at hand and saying exactly what you mean.  Practice getting rid of “fillers” like “um,” “uh,” “I think,” etc.  Even if you aren’t using them because you’re uncertain of what you want to say, they tend to sound that way.  A silent pause is preferable. Use “chunking” while speaking — pause for effect between bursts of speech that each emphasize a key point.  Give people a chance to soak in what you are saying. Making eye contact and facing the audience have already been mentioned in this article, but there are additional steps you can take to demonstrate command of the room when you are addressing a group of people.  You want all eyes on you as much as possible.  Walk around the stage or the part of the room you are occupying, as if you are marking it as your territory.  You don’t need to stalk it like an animal, but walk and stand with confidence — as mentioned, it will be reflected in your voice. Don’t be afraid of hand gestures either.  Keeping your hands glued to the podium or clasped together may appear like fear or submission.  No one needs to see you pound your shoe on the desk or anything of that sort, but some confident, deliberate gesturing will add weight to your words and your appearance. In addition to adding some depth to your voice, finishing off sentences properly, and eliminating “fillers,” you can also work to perfect the tone and pace of your speaking.  Speaking too quickly, too softly, or without enthusiasm can all be remedied with practice, and give your words more authority in the process.  You might feel silly reciting famous speeches from Shakespeare’s works in your bathroom mirror, but doing so can in fact be helpful.  Think of yourself as a great actor on the stage, tackling Hamlet or Macbeth.  Speaking with authority will come naturally. More practically, you can practice the speech you’re going to give in a similar manner.  Take note of your tone, pacing, volume, gesturing, and so on.  Consider recording yourself so you can examine your practice run.
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One-sentence summary -- Face people and make eye contact. Talk in a deep, steady voice and finish each sentence. Make use of silence. Claim the stage. Practice your authoritative voice.

Article: Clearly state to the harasser the specific thing they are doing and that the behavior is inappropriate. For example, say, “Do not whistle at me, that is harassment,”,"I am not comfortable by the way you are touching me. Stop! That is harassment" or “Do not touch my butt. That is sexual harassment.”  Attack the behavior, not the person. Tell them what they are doing that you do not like (“You are standing too close”) rather than blaming them as a person (“You are such a jerk”). Avoid cursing, name-calling, put-downs, and other actions that may escalate the situation unnecessarily. Avoid making statements of opinion such as, “I’d like it if you didn’t touch me.” This can invite further conversation. Provide alternatives if necessary, such as, “You are standing too close. Please give me 3 feet of personal space.” If the person continues the unwanted behavior, it might be time to break off contact. Tell the person that you expect them to stay away, and that you will no longer be answering correspondence. Be clear that if the person continues harassing you, you will take steps to put a stop to it.  You might say, “Your behavior is making me uncomfortable. Please don’t contact me again. If you do, I will call the police.” Do not get into a dialogue with the harasser, or try to reason with them, or answer their questions. You do not need to respond to diversions, questions, threats, blaming, or guilt-tripping. If the harasser is someone you have to see frequently—say, someone at school or someone who works with you—you can still set boundaries that make sense for your situation. Tell the person to stop hanging out by your desk or approaching you at lunchtime, for example. If the person tries to get in touch, don't answer their calls, emails, or texts. At this point, you've made your position clear, so if the person continues to contact you, they are explicitly going against the boundaries you've laid out. This way you'll ensure the harasser no longer has access to you or the information you share with other people. Delete the person from your phone, and set up a block on that number if possible. Unfriend the person from your Facebook, Twitter, Instagram and other accounts.  There’s a chance the person may try to friend or follow you again using a different identity. Closely screen new connections and verify their identity before accepting any requests. If the person has posted something disparaging about you, you can flag the post and alert the staff (of Facebook, Twitter, etc.) so that the post will be removed.
Question: What is a summary of what this article is about?
Name the behavior and state that it is wrong. Tell the person to stop contacting you. Voice your boundaries with someone you'll see often. Stop answering the person's calls, emails, and other messages. Remove the person from your phone and social media accounts.