"In speaking of our educational system as it is at present," the doctor went on, "I should guard you against the possible mistake of supposing that the course which ends at twenty-one completes the educational curriculum of the average individual. On the contrary, it is only the required minimum of culture which society insists that all youth shall receive during their minority to make them barely fit for citizenship. We should consider it a very meager education indeed that ended there. As we look at it, the graduation from the schools at the attainment of majority means merely that the graduate has reached an age at which he can be presumed to be competent and has the right as an adult to carry on his further education without the guidance or compulsion of the state. To provide means for this end the nation maintains a vast system of what you would call elective post-graduate courses of study in every branch of science, and these are open freely to every one to the end of life to be pursued as long or as briefly, as constantly or as intermittently, as profoundly or superficially, as desired. "The mind is really not fit for many most important branches of knowledge, the taste for them does not awake, and the intellect is not able to grasp them, until mature life, when a month of application will give a comprehension of a subject which years would have been wasted in trying to impart to a youth. It is our idea, so far as possible, to postpone the serious study of such branches to the post-graduate schools. Young people must get a smattering of things in general, but really theirs is not the time of life for ardent and effective study. If you would see enthusiastic students to whom the pursuit of knowledge is the greatest joy of life you must seek them among the middle-aged fathers and mothers in the post-graduate schools. "For the proper use of these opportunities for the lifelong pursuit of knowledge we find the leisure of our lives, which seems to you so ample, all too small. And yet that leisure, vast as it is, with half of every day and half of every year and the whole latter half of life sacred to personal uses--even the aggregate of these great spaces, growing greater with every labor-saving invention, which are reserved for the higher uses of life, would seem to us of little value for intellectual culture, but for a condition commanded by almost none in your day but secured to all by our institutions. I mean the moral atmosphere of serenity resulting from an absolute freedom of mind from disturbing anxieties and carking cares concerning our material welfare or that of those dear to us. Our economic system puts us in a position where we can follow Christ's maxim, so impossible for you, to 'take no thought for the morrow.' You must not understand, of course, that all our people are students or philosophers, but you may understand that we are more or less assiduous and systematic students and school-goers all our lives."