The language here is among the strongest in Proverbs: lying is an 'abomination' — a word of intense divine revulsion. Conversely, truthful dealing produces divine 'delight' — God's pleasure and joy. This verse makes honesty a matter of God's character and nature, not merely social utility.
Memory phrase: God delights in truth.
Talk about it: Why does God feel so strongly about lying?
Prayer: God, let my lips be Your delight, not Your disgust.