(Proverbs 12:17 KJV) He that speaketh truth sheweth forth righteousness: but a false witness deceit.
The simple statement here is that the believer “speaks” (6315) “truth” (530). Many people try to fudge on this. They come up with many excuses and qualifications. If that is how you swing then it is questionable if you are a believer. True is the opposite of false. It makes a difference.
So? Speak truth. Is that simple enough for you?