“Over a lifetime of observation, it is clear to me that the farmer who observes the Sabbath day seems to get more done on his farm than he would if he worked seven days. The mechanic will be able to turn out more and better products in six days than in seven. The doctor, the lawyer, the dentist, the scientist will accomplish more by trying to rest on the Sabbath than if he tries to utilize every day of the week for his professional work. I would counsel all students, if they can, to arrange their schedules so that they do not study on the Sabbath. If students and other seekers after truth will do this, their minds will be quickened and the infinite Spirit will lead them to the verities they wish to learn. This is because God has hallowed his day and blessed it as a perpetual covenant of faithfulness. (See Ex. 31:16.) . . .What is worthy or unworthy on the Sabbath day will have to be judged by each of us by trying to be honest with the Lord. On the Sabbath day we should do what we have to do and what we ought to do in an attitude of worshipfulness and then limit our other activities.”

Source: “The Lord’s Day,” Ensign, November 1991, pp. 34-35