The greatest obstacle to progress is not ignorance, but the illusion of knowledge.
How many times must a man look up Before he can see the sky？
The future of construction lies in materials that are both durable and environmentally friendly.
The spread of liberal democracy and the integration of the world economy are the two main forces driving the world towards the end of history.
Legal systems are not static; they evolve over time in response to social changes.
The money came between us like a ghost, and I could not touch her hand without feeling that chill.
