If anyone is crazy enough to want to kill a president of the United States, he can do it. All he must be prepared to do is give his life for the president's.

Let us never negotiate out of fear. But let us never fear to negotiate.

It is our task in our time and in our generation, to hand down undiminished to those who come after us, as was handed down to us by those who went before, the natural wealth and beauty which is ours.

A medical revolution has extended the life of our elder citizens without providing the dignity and security those later years deserve.

[War] can no longer be of concern to great powers alone.

For I can assure you that we love our country, not for what it was, though it has always been great - not for what it is, though of this we are deeply proud - but for what it someday can, and, through the efforts of us all, someday will be.

It is time for a new generation of leadership.