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Everything flows, everything changes, nothing remains.

The more you know, the more you realize how little you know.

The most successful businesses are those that put people first.

The great challenge of the modern world is to create institutions that are strong enough to govern effectively but also accountable and responsive to the needs of citizens.

As to the gods, I have no means of knowing either that they exist or that they do not exist. For many are the obstacles that impede knowledge, both the obscurity of the question and the shortness of human life.