By continual teaching (and also by example, I hope). I imprint deeply on their young minds a habitual reverence for all the principles of religion. While they pass through other branch of knowledge, I comment on the uncertainty of each branch, on the controversies of men, on the obscurity of all philosophy, and on the strange, ridiculous conclusions that some of the greatest geniuses have derived from the principles of mere human reason. Having thus tamed their mind to a proper submission and distrust of their own abilities, I no longer hesitate to open to them the greatest mysteries of religions; and I see no risk that the presumptuous arrogance of philosophy will lead them to reject the most established doctrines and opinions.