A speech is like a love affair. Any fool can start it, but to end it requires considerable skill.
God made human race above every other species. We are the only 'mortal mammals' who can express in words what we see, hear and feel. But how often do we actually use this gift in the correct direction? We misuse our power of speech, are stingy in being expressive, are articulate enough to mold the words to our selfish advantage, use them to make fun of those who impart pearls of wisdom or remind us to remember our creator, are disrespectful to those who care for us and most often are more complaining than thankful.
I have hurt quiet a few people by giving into impulsiveness and speaking what I shouldn’t have. But words are like an arrow, cannot be reversed once they are out. You can just hope, later someday, that the wounds are now healed and you are forgiven.
Understanding people, maintain relations with ones who matter, is a life long process which is made easy with a kind heart and a sweet tongue.