Curiosity must be kept alive.

The Marines I have seen around the world have the cleanest bodies, the filthiest minds, the highest morale, and the lowest morals of any group of animals I have ever seen. Thank God for the United States Marine Corps!

I'm sure that all the drivers and motorcycle police had once been racing drivers and were eager to get back to that profession.

I have spent many years of my life in opposition, and I rather like the role.

This is a strange, little, complacent country [Switzerland], in many ways a USA in miniature but of course nearer the center of disturbance!

...conservation of land and conservation of people frequently go hand in hand.

Of course Mahatma Gandhi you might say did not have so much physical vigor but he certainly seemed to have extraordinary resistance, which perhaps is rather different from physical vigor.