Lies and Deceit

A lie can only be covered up with more lies.
Truthful lips will be established forever, but a lying tongue is only for a moment.
Proverbs 12:19 
The getting of treasures by a lying tongue is a fleeting vapor, the pursuit of death.
Proverbs 21:6

Deceit can only be concealed by more deceit.
Put away from you a deceitful mouth, and put devious lips far from you.
Proverbs 4:24
The wisdom of the prudent is to understand his way, but the folly of fools is deceit.
Proverbs 14;8

Truth, on the other hand, needs no cover.
Therefore, laying aside falsehood, speak truth, each one of you, with his neighbor, for we are members of one another.
Ephesians 4:25
Truth is not the best policy, it's the only policy.
Do not let kindness and truth leave you; bind them around your neck, write them on the tablet of your heart.
Proverbs 3:3
Buy truth, and do not sell it, get wisdom and instruction and understanding.
Proverbs 23:23
Lying lips are an abomination to the Lord, but those who deal faithfully are His delight.
Proverbs 12:22