I found the following advice from Mary Baker Eddy to one of her promising students, Janette Weller, instructional.
Weller had taken Christian Science class instruction and was at work building her public practice of Christian Science. She had just sold her house to move to a new location when she discussed her new situation with Mrs. Eddy:
“…I explained to her that I had sold my New Hampshire home, had received the money for it, and had come to Boston to work. Mrs. Eddy later said: “Now that you’ve got your money in payment for your house, you put it in a good, safe place,–lay it up for a rainy day. You don’t know what you may have to meet. Your practice may be taken away from you, and you will need to have your money where you can get your hand upon it.”
The words “Your practice may be taken away from you,” I’m sure meant, “temporarily taken away,” if ever. Christian Science had given Weller the understanding she needed to demonstrate over any belief of lack in the future, and Eddy knew this. But Mrs. Eddy was following Jesus’ rule, “Be wise as serpents,” (Matt. 10:16) which means to me, “Always stay one step ahead of error!” It’s wisdom to not give mortal mind an opportunity to stop good from moving ahead, and the belief of financial lack, or debt, is often one of those temptations.
Weller went on to be a very successful healer and worker in the Cause.
She wrote further about the above advice:
“This scientific caution, in regard to money and the care of it, proved most helpful to me, and I have many times passed it on to others who have manifested more generosity than wisdom in their method of giving; and they have also, been grateful to Mrs. Eddy for her good advice.” (In my True Light and Life, MBE Collections, p. 585).