The verse states, ‘for I have given you good merchandise, do not leave my Torah’. ‘Good’ is a relative term, for something considered good by a poor person is worthless to a rich person, and something valuable to a rich person is considered negligible to a king, etc. So the verse tells us that the Torah is considered good even by the Creator Himself, so much so that he saves it in his treasure house. From this we understand that it must be essentially good, and we should never forsake it.