Rudimental Divine Science by Mary Baker Eddy

These people should not be expected, more than others, to give all their time to Christian Science work, receiving no wages in return, but left to be fed, clothed, and sheltered by charity. Neither can they serve two masters, giving only a portion of their time to God, and still be Christian Scientists. They must give Him all their services, and "owe no man." To do this, they must at present ask a suitable price for their services, and then "conscientiously earn their wages", strictly practising Divine Science, and healing the sick.

The author never sought charitable support, but gave fully seven-eighths of her time without remuneration, except the bliss of doing good. The only pay taken for her labors was from classes, and often those were put off for months, in order to do gratuitous work. She has never taught a Primary class without several, and sometimes seventeen, free students in it; and has endeavored to take the full price of tuition only from those who were able to pay. The student who pays must of necessity do better than he who does not pay, and yet will expect and require others to pay him. No discount on tuition was made on higher classes, because their first classes furnished students with the means of paying for their tuition in the higher instruction, and of doing charity work besides. If the Primary students are still impecunious, it is their own fault, and this ill-success of itself leaves them unprepared to enter higher classes.