The Framers of the Constitution knew that free speech is the friend of change and revolution. But they also knew that it is always the deadliest enemy of tyranny.
When I was 40 my doctor advised me that a man in his 40s shouldn't play...
You do have to change things as warfare changes.
Praise or blame has but a momentary effect on the man whose love of beauty in the abstract makes him a severe critic on his own works.