God has provided useful employments for the development of health, and these useful employments will also qualify students to be a help to themselves and to others. (AH 509.1) MC VC

In the place of providing diversions that merely amuse, arrangements should be made for exercises that will be productive of good. (AH 509.2) MC VC

Missionary Activity Is an Ideal Exercise—There are plenty of necessary, useful things to do in our world that would make the pleasure amusement exercise almost wholly unnecessary. Brain, bone, and muscle will acquire solidity and strength in using them to a purpose, doing good, hard thinking, and devising plans which shall train them to develop powers of intellect and strength of the physical organs, which will be putting into practical use their God-given talents with which they may glorify God. (AH 509.3) MC VC

It is our duty ever to seek to do good in the use of the muscles and brain God has given to youth, that they may be useful to others, making their labors lighter, soothing the sorrowing, lifting up the discouraged, speaking words of comfort to the hopeless, turning the minds of the students from fun and frolic which often carries them beyond the dignity of manhood and womanhood to shame and disgrace. The Lord would have the mind elevated, seeking higher, nobler channels of usefulness. (AH 509.4) MC VC

The same power of exercise of mind and muscle might invent ways and means of altogether a higher class of exercise, in doing missionary work which would make them laborers together with God, and would be educating for higher usefulness in the present life, in doing useful work, which is a most essential branch in education.... (AH 509.5) MC VC