Tragedy is a tool for the living to gain wisdom, not a guide by which to live.
Progress is a nice word. But change is its motivator. And change has its enemies.
One of the greatest pieces of economic wisdom is to know what you do not know.
Prediction is very difficult, especially about the future.
Wisdom is the quality that keeps you from getting into situations where you need it.
The eggs do not teach the hen.
Mistakes are the portals for discovery.
Wisdom makes but a slow defence against trouble, though at last a sure one.
Cleverness is not wisdom.
The secret of life, though, is to fall seven times and to get up eight times.
To be surprised, to wonder, is to begin to understand.
In the field of observation, chance favors the prepared mind.
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