Full Idea
Respect for the freedom of others is the highest duty of man. To love this freedom and to serve it - such is the only virtue. That is the basis of all morality; and there can be no other.
Gist of Idea
Respect for freedom is the highest duty and virtue
Source
Mikhail Bakunin (Science and the Urgent Revolutionary Task [1870], p.137)
A Reaction
I sometimes think that respect might be the highest virtue, but that would involve more than respect for someone's freedom. Freedom to commit suicide? Freedom to oppress others? Freedom to be miserable? Freedom to believe nonsense?
Book Reference
'The Anarchists', ed/tr. Horowitz,Irving L. [Dell 1964], p.137