Full Idea
The invalid is a parasite on society.
Gist of Idea
Invalids are parasites
Source
Friedrich Nietzsche (Twilight of the Idols [1889], 8.36)
Book Reference
Nietzsche,Friedrich: 'Twilight of the Idols and The Anti-Christ', ed/tr. Hollingdale,R.J. [Penguin 1972], p.88
A Reaction
I'll skip the rest, but you get the idea. The point (with which I sympathise) is that life is primarily about what healthy people do. Something has gone wrong if all we do is worry about the sick and the suffering.