From The Contemporary Review Vol 36 No 3, in “On Freedom”, being digitized at Distributed Proofreaders:

Freethinkers, and I use that name as a title of honour for all who, like Mill, claim for every individual the fullest freedom in thought, word, or deed, compatible with the freedom of others, are apt to make one mistake. Conscious of their own honest intentions, they cannot bear to be mistrusted or slighted. They expect society to submit to their often very painful operations as a patient submits to the knife of the surgeon. That is not in human nature. The enemy of abuses is always abused by his enemies. Society will never yield one inch without resistance, and few reformers live long enough to receive the thanks of those whom they have reformed.