Always beware of unexamined assumptions. When we speak and act, we do so on the basis of what we instinctively know to be the case. When we are right, this is right and proper—it is how we were created to live. We cannot be examining all our assumptions constantly. We have to live on the basis of them, and this requires thinking about other things—like the traffic ahead of you, or the math problem you are solving, or the best way to get dinner on.
But unexamined assumptions are dangerous because, when they are unbiblical, they often urge you to the practical details of Christian living, but they do so in a way that radically redefines what it is to live as a Christian.
Holiness, for example, is not a tangle of scruples. Holiness is not pettiness. And, at the base, holiness is never timidity or cowardice. The kingdom of God is righteousness, peace and joy in the Holy Spirit. Holiness is not what is so often done in the name of the kingdom—behaving in such a way as to ensure that we will never come into conflict with the principalities and powers.
What was God about when He called forth a holy people, and caused them to remain in an unholy world? What did He intend by this? What was His purpose? The answer is not long in coming. He intended a conflict, a war. Moreover, He intended that His people, His holy people, would win this war, would overcome in this conflict. He intended that we would triumph, but not through the use of carnal weapons. Rather, He intended for us to use the weapons that He issued to us. He intended for us to wage war in our worship, in our liturgy, in the godliness of our families, in our love for one another, in our Sabbath celebrations, in our psalm-singing, in our communion with all the saints, and in our laughter.
Come, therefore, and serve Him.