Eph 4:3-5 Endeavoring to keep the "Unity of the Spirit"

What does keeping the "unity of the Spirit" entail?

Proverbs 6:16-19 16 These six things the LORD hates, Yes, seven are an abomination to Him: 17 A proud look, A lying tongue, Hands that shed innocent blood, 18 A heart that devises wicked plans, Feet that are swift in running to evil, 19 A false witness who speaks lies, And one who sows discord among brethren.