Nobody is a cure.
To assume that I and I alone have all the answers is to eventually find myself entirely alone without any answers.
As a confirmed melancholic, I can testify that the best and maybe only antidote for melancholia is action. However, like most melancholics, I suffer also from sloth.
Oblivion cures the old wounds.
The question is not how to get cured, but how to live.
You will be most readily cured of vanity or presumption by studying the history of music, and by hearing the master pieces which have been produced at different periods.