I think that this is the most important thing we have to know from Rabbi Hirsch’s book on Mishle:
“These are the six things which the Lord hates, but the seventh is an abomination to His Being: haughty eyes, a lying tongue, and hands that shed innocent blood; a heart which devises thoughts of injustice, feet that are swift in running to evil, a false witness spreading lies, and he who causes discord between brethren.” (6.16-19)