What does Proverbs 6:17 mean?

This begins listing some of the sins which God was said to "hate" in prior verses (Proverbs 6:16).

First is the attitude of a person who is arrogant, egotistical, or proud. This attitude causes someone to look down their nose at others. In Psalm 101:5 the Lord says, "Whoever has a haughty look and an arrogant heart I will not endure." A prime example of someone with haughty eyes is the proud Pharisee who entered the temple to pray. When he saw a humble tax collector nearby, he boasted to God: "God, I thank you that I am not like other men…or even like this tax collector" (Luke 18:11). He referred to his self-righteous deeds, but God rejected him. In His Sermon on the Mount, the first of Jesus' beatitudes refers to those who are "the poor in spirit" (Matthew 5:3).

Second is God also hates "a lying tongue" (Proverbs 6:17). Earlier verses described those who deceive others as "wicked" and "worthless" (Proverbs 6:12). Ananias and Sapphira lied to the Holy Spirit, saying they had offered the total sales revenue of their property; God struck them dead (Acts 5:1–10).

Third is violence against the innocent. This was mentioned earlier in the book of Proverbs (Proverbs 1:16) in connection with evil. Violence, revenge, and anger are all bad enough in and of themselves (Romans 12:19). Especially heinous is to use violence against those who are "innocent," in the sense that they've done nothing to deserve that treatment from other people.