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.