We must dare to think unthinkable thoughts.

We must dare to think 'unthinkable' thoughts. We must learn to explore all the options and possibilities that confront us in a complex and rapidly changing world.

I think we Americans tend to put too high a price on unanimity, as if there were something dangerous and illegitimate about honest differences of opinion honestly expressed by honest men.

In a democracy, dissent is an act of faith.

It is not our affluence, or our plumbing, or our clogged freeways that grip the imagination of others. Rather, it is the values upon which our system is built. These values imply our adherence not only to liberty and individual freedom, but also to international peace, law and order, and constructive social purpose. When we depart from these value, we do so at our peril.

We must dare to think about "unthinkable things" because when things become "unthinkable" thinking stops and action becomes mindless.