A.w. Tozer said this quote

The layman need never think of his humbler task as being inferior to that of his minister. Let every man abide in the calling wherein he is called and his work will be as sacred as the work of the ministry. It is not what a man does that determines whether his work is sacred or secular, it is why he does it. The motive is everything. Let a man sanctify the Lord God in his heart and he can thereafter do no common act.