The Lord wants to reveal things to us that sometimes will require us to look closer to fully grasp it. The Bible says the kingdom of God isn't eating and drinking (in other words, just living), but it is "righteousness, peace, and joy in the Holy Ghost" (Romans 14:17).
The jest of this portion of scripture is alluding to judging others unrighteously, including withholding our opinion as an act of love. The kingdom of God is not a political party, this rule or that rule-- it is purely righteousness, peace, and joy in the Spirit! And as we mature, it's important to center ourselves on these things.