Medicine, the only profession that labors incessantly to destroy the reason for its own existence.

Patriotism consists not in waving the flag, but in striving that our country shall be righteous as well as strong.

Our country is not the only thing to which we owe our allegiance. It is also owed to justice and to humanity.

The worth of a book is to be measured by what you can carry away from it.

The national park is the best idea America ever had.

Communication is the key to education, understanding and peace.

Three-fourths of the mistakes a man makes are made because he does not really know the things he thinks he knows.

Individualism, the love of enterprise, and the pride in personal freedom, have been deemed by Americans not only as their choicest, but their peculiar and exclusive possessions.

To most people, nothing is more troublesome than the effort of thinking.

A political career brings out the basest qualities in human nature.

The chief practical use of history is to deliver us from plausible historical analogies.

Knowing what's ETERNAL will sustain you through the EPHEMERAL.

A kitten is in the animal world what a rosebud is in the garden.

Shoes make an outfit they're like rims for a car.

The future is green energy, sustainability, renewable energy.

I suppose that for most people one of the darker joys of gardening is that once you've got started it's not at all hard to find someone who knows a little bit less than you.

When we are on stage, we are in the here and now.

Give. Remember always to give. That is the one thing that will make you grow.

I wrote about four novels before I wrote a word of journalism.

When you increase the number of gardens, you increase the number of heavens too!

To die is one thing. How much worse to know that all the life that ever existed on this planet, and all it ever achieved, was to be obliterated?