1.) Liars Are In Love with Themselves And Besides.. the Bible Literally Connects Lying with real Hate.
You don't want to be a hater do you? Likers gunna like, so let's not be a hater of any human.
2.) Liars Are Cowards.
It takes courage and boldness to live the truth and daily stand up for with what's true.
3.) Liars Lose Their Good Name and Their Reputation.
Both of those take a lot of time to gain or regain, yes, they are really hard to re-establish from scratch. It's all about denying ourselves of what is hurtful (to others or us), and the choices we each make including the follow-through in keeping our promises.