Success in business requires training and discipline and hard work. But if you're not frightened by these things, the opportunities are just as great today as they ever were.

The negative impact of population growth on all of our planetary ecosystems is becoming appallingly evident.

I learned more from my mother than from all the art historians and curators who have informed me about technical aspects of art history and art appreciation over the years.

I think that the best hope for peace and prosperity in the world is greater cooperation among nations, which in turn will be produced if both our governments and the people of our countries travel more and get to know each other better.

I realize how fortunate I have been; mine has been a wonderful life.

I never kept a diary, but I wrote detailed notes of my travels.

The attacks on the World Trade Center and the current economic recession, which is particularly powerful in New York City, have put a number of building plans on hold for the time being.