"There should...be an increasing number of theologians whose vocational position should be in the midst of contemporary society as workers or salaried employees, parliamentarians or journalists, etc, so that they will experience in concrete form what it means to bear responsibility for secular life ...
They should uncover the theological relevance of the most concrete social facts and processes of the sort that can be grasped only by having lived through them with others, deliberated together about them and come to common decisions. ... They would discover for the churches what things in the secular world are 'true, honourable, just, pure, lovely, gracious, excellent, praiseworthy' and help them to 'think about these things'. (Phil 4:8ff). They would help us 'prove what is the will of God, what is good, acceptable and perfect' ". (Rom 12:2).
(Horst Symanowski, Pastor in the German Confessing Church (The Christian Witness in an Industrial Society 1966) Symanowski worked in a cement factory and in construction for a number of years.