We are living in a time of great change -- in our world, in our economy, and in science and medicine. Yet some things endure -- courage and compassion, reverence and integrity, respect for differences of faith and race. The values we try to live by never change. And they are instilled in us by fundamental institutions, such as families, and schools, and religious congregations. These institutions -- the unseen pillars of civilization -- must remain strong in America, and we will defend them.