I have procured air [oxygen] ... between five and six times as good as the best common air that I have ever met with.
Joseph PriestleyThis is unfortunately a world in which things find it difficult, frequently impossible, to live up to their names.
Joseph PriestleyEvery man, when he comes to be sensible of his natural rights, and to feel his own importance, will consider himself as fully equal to any other person whatever
Joseph Priestley