If you don;t let people know that you are kidding they could take It as an offence.and we do not no weather we are hurting our own brother or someone who does not know Christ. and that,s the last thing we should want to do. we need to show the world that we love each other.If I have used any sarcasm I always initial lol or hehe or something to let that person know I am just kidding and then I would end with a closing like peace and God bless.
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For by your words you will be justify, and by your words, you will be condemned,
matthew-12:37