The word "good" is commonly used in a human, unspiritual meaning, to indicate a human quality, better than bad, but still human and so not associated with, nor expressive of, the only real good, God.
Mary Baker Eddy, in choosing words with which to express her discovery of Christian Science, gave the word "good" its basic, spiritual meaning, making it synonymous with God, man's only true Life.
Christian Science persistently emphasizes the point that we find genuine good only as we find the one living God, and conversely we find God only as we find the good which is the one Life-substance of man.