From Liberalism: In the Classical Tradition — surrounding passage

The usual procedure adopted by the critic is to imagine how wonderful everything would be if only he had his own way. In his dreams he eliminates every will opposed to his own by raising himself, or someone whose will coincides exactly with his, to the position of absolute master of the world.

“Everyone who preaches the right of the stronger considers himself as the stronger. He who espouses the institution of slavery never stops to reflect that he himself could be a slave.”

He who demands restrictions on the liberty of conscience demands it in regard to others, and not for himself.