Civilization never recedes; the law of necessity ever forces it onwards.

As for difficulties," replied Ferguson, in a serious tone, "they were made to be overcome.

The sole precoccupation of this learned society was the destruction of humanity for philanthropic reasons and the perfection of weapons as instruments of civilization.

The earth does not need new continents, but new men.

Travel enables us to enrich our lives with new experiences, to enjoy and to be educated, to learn respect for foreign cultures, to establish friendships, and above all to contribute to international cooperation and peace throughout the world.

We may brave human laws, but we cannot resist natural ones.

The human mind delights in grand conceptions of supernatural beings.