…if you repeat to a child, if you make him repeat, “I am good, day by day more and more.” “I am better and better, I am more and more obedient.”
Oh, but this is very fine. (To a child) The other day you wanted to know what to do for children who are difficult to bring up.
Here you are, you can try this. “I am more and more regular at school.”
And then again, “I don’t tell lies any more. I shall never lie again.”
Ref: Questions and Answers – 1955