Macbeth:
Canst thou not minister to a mind diseas'd,
Pluck from the memory a rooted sorrow,
Raze out the written troubles of the brain,
And with some sweet oblivious antidote
Cleanse the stuff'd bosom of that perilous stuff
Which weighs upon the heart?
Doctor:
Therein the patient
Must minister to himself.
-William Shakespeare (Macbeth Act 5, scene 3, 40–47 )