I agree … that a professorship of Theology should have no place in our institution. But we cannot always do what is absolutely best. Those with whom we act, entertaining different views, have the power and the right of carrying them into practice. Truth advances, and error recedes step by step only; and to do to our fellow men the most good in our power, we must lead where we can, follow where we cannot, and still go with them, watching always the favorable moment for helping them to another step.

Comment on establishing the University of Virginia, in a letter to Thomas Cooper (7 October 1814); published in The Writings of Thomas Jefferson (1905) edited by Andrew Adgate Lipscomb and Albert Ellery Bergh, Vol VII, p. 200.

https://books.google.com/books?id=jrSgJGp-B64C&pg=...