Under the doctrine of separation of powers, the manner in which the president personally exercises his assigned executive powers is not subject to questioning by another branch of government.

It is essential that we take steps to prevent chemical substances from becoming environmental hazards. Unless we develop better methods to assure adequate testing of chemicals, we will be inviting the environmental crisis of the future.

For among nations - as within nations - the soundest unity is that which respects diversity, and the strongest cohesion is that which rejects coercion.

We can no longer afford to consider air and water common property, free to be abused by anyone without regard to the consequences. Instead, we should begin now to treat them as scarce resources, which we are no more free to contaminate than we are free to throw garbage into our neighbor's yard.

We must maintain the integrity of the White House, and that integrity must be real, not transparent. There can be no whitewash at the White House.

Any culture which can put a man on the Moon is capable of gathering all the nations of the earth in peace, justice and concord.

Once genius is submerged by bureaucracy, a nation is doomed to mediocrity.