Don't let it fall on deaf ears

 If you want them to hear you then say it in a way they can hear it. 

  If you start off with an angry tone they will not hear you. Because they will choose to not hear you. 

  Your words of wisdom won't help anyone if you say them with an angry tone. The minute they feel your anger they will tune you out in DEFENSE MODE.

  If you want them to listen to what you have to say then make sure you say it in a way that they want to listen. 

  It's not that they don't need to hear it. It's just in DEFENSE MODE they can't hear it. Your words might be exactly what they need to hear so say it in a tone that doesn't sound like an attack which sends them into DEFENSE MODE.

  Remember it's not only what you say but it is also how you say it. 

  Imagine a dog running up to you and barking aggressively at you. Would you want to pet him? 

  If you want them to hear you then make sure your tone doesn't make your words fall on deaf ears. They can't hear you if they are in DEFENSE MODE.