What a country calls its vital economic interests are not the things which enable its citizens to live, but the things which enable it to make war. Petrol is more likely than wheat to be a cause of international conflict.

We cannot take a step toward the heavens. God crosses the universe and comes to us.

When literature becomes deliberately indifferent to the opposition of good and evil it betrays its function and forfeits all claim to excellence.

Contradiction itself, far from always being a criterion of error, is sometimes a sign of truth.

The joy of learning is as indispensable in study as breathing is in running. Where it is lacking there are no real students, but only poor caricatures of apprentices who, at the end of their apprenticeship, will not even have a trade.

When a contradiction is impossible to resolve except by a lie, then we know that it is really a door.

The joy of learning is as indispensable in study as breathing is in running.