"We schoolmasters must temper discretion with deceit"

In this quote, author Evelyn Waugh is suggesting that schoolmasters must stabilize their use of discretion with a particular level of deceit. This may appear contradictory, as discretion is typically connected with honesty and stability, while deceit indicates deceptiveness and dishonesty. However, Waugh may be suggesting that in order to successfully direct and educate trainees, schoolmasters should often use subtle techniques or keep particular information in order to achieve a wanted outcome. This could be seen as a needed compromise in the pursuit of education and the molding of young minds. Ultimately, Waugh is highlighting the complex and fragile nature of the role of a schoolmaster.