We have been through, over these years, some difficult times. During the period that I have served as President of the United States, we have been through some difficult times together, and I can only say that the friendship that we have for this nation, the respect and the admiration we have for the people of this nation, their courage, their tenacity, their firmness in the face of very great odds, is one that makes us proud to stand with Israel, as we have in the past in times of trouble, and now to work with Israel in a better time, a time that we trust will be a time of peace.

With all our differences, whenever we are confronted with a threat to our security we are not then Republicans or Democrats but Americans; we are not then the fifty states but the United States.

I don't think that a leader can control, to any great extent, his destiny. Very seldom can he step in and change the situation if the forces of history are running in another direction.

As our cities and suburbs relentlessly expand, those priceless open spaces needed for recreation areas accessible to their people are swallowed up-often forever. Unless we preserve these spaces while they are still available, we will have none to preserve.

Don't try to take on a new personality; it doesn't work.

The recent upsurge of public concern over environmental questions reflects a belated recognition that man has been too cavalier in his relations with nature. Unless we arrest the depredations that have been inflicted so carelessly on our natural systems-which exist in an intricate set of balances-we face the prospect of ecological disaster.

This Memorial Day should remind us of the greatness that past generations of Americans achieved from Valley Forge to Vietnam, and it should inspire us with the determination to keep America great and free by keeping America safe and strong in our own time, a time of unique destiny and opportunity for our Nation.