Please Say/Whisper The Words Out Loud
Lesson 1
Statements that contain associations which are painful for a particular person can be considered onaas devorim (verbal abuse). If the person you are speaking to would suffer, even if the same thing wouldn't mean anything to someone else, you should not bring it up. For example, if someones friend or relative overdosed, don't bring up that word in front of them, even if you are speaking about someone else.
Lesson 2
If someone tries to share their problems with you and you say to them "I don't care, that's your problem" You can be causing them a lot of pain. Feeling that no one cares about your difficulties in life makes those difficulties harder to cope with.