The Protestant Reformation on Sabbath-Keeping

"It is still good and even necessary that men should for the sake of the Word of God keep a particular day of the week — on which they are to meditate, hear, and learn…. Nature requires that one day in the week should be kept…without labour either for man or beast."4 

REV. PROF. DR. MARTIN BUCER (1491-1551):

"Since our God with singular goodness towards us has sanctified one day out of seven…and blessed that day, so that the sacred exercises of religion performed on it might be effectual to the promoting of our salvation — he verily shows himself to be a wretched despiser…who does not study to sanctify that day to the glorifying of his God…. Since God has granted six days for our works and employments….