Read Proverbs 19:5  What is a witness?  A witness is someone who is called into court.  A witness has some first-hand information about an important decision that the judge and jury have to make.  They know something that no one else knows and they have to give testimony in the courtroom.  The witness has to faithfully tell what they saw and heard.  But, what if the witness lies.  Will the decision that the judge and jury make be fair?  Will the lies of this false witness affect the outcome of the court trial?  Will an innocent person be found guilty?  Will a guilty person go free?  When false testimony is given, everything turns out wrong.  The wrong person suffers and the wrong person gets to go free.  That is why God hates a liar.  God says that a false witness should be punished.  But the problem is that no one knows that the false witness is lying.  He gives his false witness in court and everyone believes his lies. He has gotten away with his lies.  Or did he... Think a minute.  Does God know the truth?  Does God know when a false witness is lying?  Someday when God judges every work of man, is the truth going to come out?  Will the false witness be found out?  Think about it.  Then the false witness will have to live with his lies for all of eternity.  That is a long time.  Although the false witness may think he is getting away with his lies before a judge here on earth, someday the false witness will be exposed as the liar that he is.  He may get away with his lies here on earth, but he will not escape when he stands before God the Righteous Judge.  God knows all and keeps a record of everything. So, tell the truth.  Be a faithful witness.  Serve God and you'll never be sorry that you did!