Summary: The Word tells us to speak to the mountain and it will move. Our words are powerful and we will get what we say. Therefore, you want to speak life not death.
What you say is critical to your walk and to those around you. God created the earth and everything in it by the Spoken Word and the Holy Spirit. Jesus was raised from the dead by the Holy Spirit. You and I have that same Holy Spirit with the same authority as they did at that time. If you can wrap your mind around the fact that the same Holy Spirit that is in you is the same One that raised Jesus from the dead, you might have an inkling of the authority that is at your fingertips.
In Mark it states:
Mark 11:23 (NIV)
"I tell you the truth, if anyone says to this mountain, 'Go, throw yourself into the sea,' and does not doubt in his heart but believes that what he says will happen, it will be done for him.
This is the type of authority your spoken word has. If you have an ailment, you can speak to it. Tell it to go back to where it came from. You do not need the Pastor to do this for you. If you have the Holy Spirit, you have the authority to do it. Many of you are prayer warriors, use that strength to Declare, and Decree what you need to happen in your life.
On the other hand, when you tell someone that they are stupid, or call him or her some other name, the verbal wound that causes can never be taken back. If you make jokes about your husband or about your friend, at their expense, that is jesting.
Ephesians 5:2-6 (KJV)
2 And walk in love, as Christ also has loved us and given Himself for us, an offering and a sacrifice to God for a sweet-smelling aroma.
3 But fornication and all uncleanness or covetousness, let it not even be named among you, as is fitting for saints; 4 neither filthiness, nor foolish talking, nor coarse jesting, which are not fitting, but rather giving of thanks.5 For this you know, that no fornicator, unclean person, nor covetous man, who is an idolater, has any inheritance in the kingdom of Christ and God.6 Let no one deceive you with empty words, for because of these things the wrath of God comes upon the sons of disobedience.
You say something to someone or about yourself and then say- “well I was just kidding.” But God does not look at it this way. We are held accountable for our words
Matthew 12:36-37 (NIV)
36But I tell you that men will have to give account on the day of judgment for every careless word they have spoken. 37For by your words you will be acquitted, and by your words you will be condemned.
Here is what The Message says:
Let me tell you something: Every one of these careless words is going to come back to haunt you. There will be a time of Reckoning. Words are powerful; take them seriously. Words can be your salvation. Words can also be your damnation."
You do not want to use your words to hurt others. We are only supposed to think on good things, do you really think God wants you to speak things other than what is good? He is our creator and wants only good things for us. But, He also wants good things for others. Would Jesus make that joke about your husband, or about your boss?
This type of joking has become acceptable in our day because the comedians on TV and sitcoms make jokes all the time at the expense of others and everyone laughs. Except maybe God. That is His creation that joke is being made about. Do you think He laughs?