Full Idea
Progress demands passions that cannot last for long.
Gist of Idea
Passion for progress is always short-lived
Source
Michael J. Sandel (Beyond Individualism [1988], p.35)
Book Reference
Sandel,Michael J.: 'Public Philosophy: Essays' [Harvard 2005], p.35
A Reaction
The obvious example, for me, is the Labour Government in the UK, 1945-51. This is the kind of realism which progressive politicians must face up to. Unfortunately it is the logic of very ruthless revolutionaries.