Harvard's motto is "Veritas." Many of you have already found out and others will find out in the course of their lives that truth eludes us if we do not concentrate with total attention on its pursuit. And even while it eludes us, the illusion still lingers of knowing it and leads to many misunderstandings. Also, truth is seldom pleasant; it is almost invariably bitter. There is some bitterness in my speech today, too. But I want to stress that it comes not from an adversary but from a friend.