In this world shipmates sin that pays its way can travel freely and without passport whereas Virtue if a pauper is stopped at all frontiers.

I belong to a nation which over the past centuries has experienced many hardships and reverses. The world reacted with silence or with mere sympathy when Polish frontiers were crossed by invading armies and the sovereign state had to succumb to brutal force.

In Israel a land lacking in natural resources we learned to appreciate our greatest national advantage: our minds. Through creativity and innovation we transformed barren deserts into flourishing fields and pioneered new frontiers in science and technology.

New discoveries in science will continue to create a thousand new frontiers for those who still would adventure.

I do not see how a man can work on the frontiers of physics and write poetry at the same time. They are in opposition.

Poetry is like a bird it ignores all frontiers.

In particular the efforts to reestablish peace after the World War have been directed toward the formation of states and the regulation of their frontiers according to a consciously national program.

The frontiers of knowledge in the various fields of our subject are expanding at such a rate that work as hard as one can one finds oneself further and further away from an understanding of the whole.

Frontiersmen good and bad gunmen as well as inspired prophets of the future have been my camp companions. Thus I know the country of which I am about to write as few men now living have known it.

If we want to talk about freedom we must mean freedom for others as well as ourselves and we must mean freedom for everyone inside our frontiers as well as outside.