Is not a woman's heart unfathomable?

Nothing is more dreadful than private duels in America. The two adversaries attack each other like wild beasts. Then it is that they might well covet those wonderful properties of the Indians of the prairies - their quick intelligence, their ingenious cunning, their scent of the enemy.

When the mind once allows a doubt to gain entrance, the value of deeds performed grow less, their character changes, we forget the past and dread the future.

To put up with what you cannot avoid is a philosophical principle, that may not perhaps lead you to the accomplishment of great deeds, but is assuredly eminently practical.

It doesn't require much thought for one to realise that any travel book worthy of the name has to be a departure from the standard idea of the form.

Look how far the human race has come in terms of air and space travel in the last hundred years. So in the next couple of thousand years, you've got to believe that we're going to be able to do all kinds of amazing things.

Learning should be a joy and full of excitement. It is life's greatest adventure; it is an illustrated excursion into the minds of the noble and the learned.

Success is a journey, not a destination.