If a man will begin with certainties, he shall end in doubts; but if he will be content to begin with doubts he shall end in certainties.
Judge a man by his questions rather than his answers.
Great minds discuss ideas; average minds discuss events; small minds discuss people.
It is easier to discover a deficiency in individuals, in states, and in providence, than to see their real import or value.
The knowledge of anything… is not acquired or complete unless it is known by its causes.
If one does not know to which port one is sailing, no wind is favorable.
Man is the measure of all things.
Beware the barrenness of a busy life.
There is nothing either good or bad, but thinking makes it so.
Wise people, even though all laws were abolished, would still lead the same life.