A consistent teaching that I have heard in Evangelical churches is that there is no such thing as sacred vs. secular. The idea is that all things hold spiritual significance. The way you drive your car through traffic says as much about you spiritually as the way you sing a hymn. The act of taking communion can be just as defiling as foul language.
There are a number of passages that bring this teaching out. One of significance is Colossians 1:19-20
For God was pleased to have all his fullness dwell in him, and through him to reconcile to himself all things, whether things on earth or things in heaven . . .
Part of the reason we aren’t raptured up into heaven once we receive salvation is because we are to take part in God’s reconciliation of all things ( 2 Corinthians 5:18). We are to do the work of making everything part of God’s Kingdom. So what we listen to on the radio on Sunday morning shouldn’t be any different than what we listen to on Monday morning. What we say and do at church is no more significant than what we say and do at the grocery store. Our ministry reaches into anything and everything. A stock broker is in full time ministry just as much as a pastor. There simply is no “holy ground.” All ground is once again being made holy.
This is contrast against the strong Mormon theme of the sacred and the secular. This dicotomy is most obviously set up by LDS temples. “The LDS temple is the holiest place on earth for Mormons. It is a sacred space” (source). The vows made in a temple are of much greater signifcance than vows made elsewhere. The actions taken in a temple have greater significance than actions taken elsewhere.
LDS garments are another source of this differentiation. Mormons have sets of clothing which have a greater religious significance than any others. I believe the LDS priesthood plays into this as well, setting the words and deeds of some as higher than the words and deeds of others.
I don’t here much discussion between Mormons and Evangelicals about this difference. But I think it’s cultural implications are profound and should be recognized. For Evangelicals there is no such thing as sacred teachings and secular teachings of the Bible, they are all the same thing. Some Mormons have anitpathy toward Evangelicals for showing up to church in blue jeans all the while Evangelicals mock Mormons for thinking that underwear can be holy (when both should be recognizing that all underwear can be a testament to Christ).
Evangelicals might have the tendency to become to casual with their faith and fail to treat God with reverance. Mormons have the danger of pining away for the sacred and remove themselves from their work within the secular. I believe the difference are sublte but greatly divide us.