All teaching is dogmatic. Dogma, indeed, means only "a thing taught," and teaching not dogmatic would cease to be teaching and would become discussion and doubt. Hilaire Belloc
A teacher who is not dogmatic is simply a teacher who is not teaching. G. K. Chesterton
Agnosticism is a perfectly respectable and tenable philosophical position; it is not dogmatic and makes no pronouncements about the ultimate truths of the universe. It remains open to evidence and persuasion; lacking faith, it nevertheless does not deride faith. Sydney J. Harris