Therein the patient…

Therein the patient
Must minister to himself.

— Shakespeare, Macbeth, Acte V, Scene 3

MACBETH.

Cure her of that:
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.

MACBETH.

Throw physic to the dogs,—I'll none of it.—