“The frontier that remains is is the interior one, the most forbidding and mysterious frontier.”
Source: Barbarian Sentiments - How The American Century Ends (1989), Chapter 7, The Possibility of Extravagant Waste, p. 189.
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William Pfaff 18
American journalist 1928–2015Related quotes

“The Frontiers of England are the Coasts of the Enemy.”
p. 92. https://archive.org/stream/cu31924027924509#page/n123/mode/1up
Records (1919) https://archive.org/stream/cu31924027924509#page/n0/mode/1up
“On earth there are frontiers, in the sky there are none.”
The cloud walker (1973)

“Liberty has restraints but no frontiers.”
International Liberal Conference (July 1928)
Later life

“Thought creates frontiers everywhere.”
Source: No Way Out (2002), Ch. 7: What Kind Of Human Being Do You Want?
Context: Thought creates frontiers everywhere. That's all it can do.... it is thought that has created the world; and you draw lines on this planet, "This is my country, that is your country". So how can there be unity between two countries? The very thing that is creating the frontiers and differences cannot be the means to bridge the different viewpoints. It is an exercise in futility.

“Life is wide, limitless. There is no border, no frontier.”
p 2
Striking Thoughts (2000)

Foreword for Discovering the Brain (1992) by Sandra Ackerman, p. iii; often paraphrased: "The brain is the most complex thing we have yet discovered in our universe."
Context: The brain is the last and grandest biological frontier, the most complex thing we have yet discovered in our universe. It contains hundreds of billions of cells interlinked through trillions of connections. The brain boggles the mind.

“Where the frontier of science once was is now the centre.”
As quoted in A Dictionary of Scientific Quotations (1991) edited by Alan Lindsay Mackay, p. 153

“I have spoken about the New Frontier.”
1963, President John F. Kennedy's last formal speech and public words
Context: For more than 3 years I have spoken about the New Frontier. This is not a partisan term, and it is not the exclusive property of Republicans or Democrats. It refers, instead, to this Nation's place in history, to the fact that we do stand on the edge of a great new era, filled with both crisis and opportunity, an era to be characterized by achievement and by challenge. It is an era which calls for action and for the best efforts of all those who would test the unknown and the uncertain in every phase of human endeavor. It is a time for pathfinders and pioneers.