In his book How I Changed My Thinking about the Church, Halverson wrote, "I devoted several days a week simply to moving from office to office shop to shop and out on the oil leases and large farms which surround the city—just being visible and available. Men became used to my presence where they were putting in their daily work and I was soon able to visit with them on their jobs.” as a result, Halversons says "I began to realize there is a real distinction between church work and the work of the church."
Larry Peabody describes Halverson's perspective well in his blog.
Halverson was the Senior Pastor of Fourth Presbyterian Church, Bethesda, Maryland from 1958 until 1981 and for14 years, was Chaplain to the US Senate serving as the conscience and confessor to our nation's lawmakers. For more on Halverson's legacy, see this article in Christianity Today.