I rather like this 2011 commencement address by Robert Blackstock. A taste:
There it is. A start. We want you to think well and often. The point bears mention, of course, because the difficulties we face as a nation, and the difficulties which you will face in college this fall, were caused in no small part by successive generations of leaders who did not think well. It’s not so much that they lack acuity or native intelligence. Rather, they have lost track of which ideas bore good fruit and which ill.
Having marched up the long and arduous road from 1776 to unprecedented freedom and prosperity, we as a nation have forgotten the ideas on which this freedom and this prosperity were first built. The danger is real and it is present. We stand to lose the blessings of liberty, if we do not reclaim those principles and habits without which those blessings cannot stand. This is an urgent concern for you, because the national conversation about ideas is especially pointed and especially off-track in our colleges and universities.