those who have not taken a consecutive course of lessons on the subject. It seems to me wise to give here a clear, simple explanation of three words frequently used, so that even the most unlearned may read understandingly.

One term often used and not always clearly understood is chemicalization.

Did you ever put soda into sour milk, cider, or other acid fluid and witness the agitation or excited action that takes place? One of the substances neutralizes the other, and something better results from the action.

This is a good illustration of what takes place sometimes in the minds and bodies of people. Suppose a man has lived in wrong thought and molded his body by wrong thought for years, until, as you might say, he has become solidified in that wrong belief. You introduce the Truth to him by strong denials and affirmations as has been taught. The very newness of it (and because it is Truth) creates in the first few days: new hope, new joy, and health. After a little time a sort of mental ferment

1. All editions of Lessons in Truth since 1942, with the exception of the 1967, 1971, and 1972 editions, did not include this material on chemicalization. It had been thought of as too negative and confusing. We are returning it with all its nineteenth-century flavor because many people experience this phenomenon (by whatever name it is called) and would benefit by reading about it. In the original manuscript, Dr. Cady also included a section on thought transference, which we have chosen to leave our because it required considerable rewriting and was not a crucial concept.