Look at this little piece of counsel: ‘He that hideth hatred with lying lips’, not, ‘has lying lips.’ The modem versions try to tidy this up, and say something like, 'He that hides hatred has lying lips, and he that utters a slander is a fool', as though there are two disconnected thoughts.
Hatred in the heart is a fatal problem and no amount of smooth talking is going to disguise it. The attempt to conceal hatred – because the speaker knows it is wrong, but still wishes to express it – only manages to produce lying lips, false statements that are not convincing. The second half of the verse goes with the first, for slander is an example of the speech of one who hates and tries to conceal his hatred. The slander is an attempt to justify his ill feeling and to get others on side to support his hostility, but the real cause is the hatred that is rooted in his heart. The slander is itself a lie and he knows that he is bearing false witness against his neighbour. God’s solution always addresses the root of the problem, and the root here is the hostility in the heart. Unless that is removed, the speech will always be corrupted and we deceive ourselves if we think we can deal with it by adjusting our words. Christ tells us that we are to love our enemies, and do good to all. This must be our starting point, for if we love our enemies then we may indeed point out failings in them; then what we say is no longer the fruit of hatred, but is said in genuine concern for the righteous standards of God and to deliver those who oppose him.