Nature has planted in our minds an insatiable longing to see the truth.

The foolishness of old age does not characterize all who are old, but only the foolish.

Time is the herald of truth.

Just what is the civil law? What neither influence can affect, nor power break, nor money corrupt: were it to be suppressed or even merely ignored or inadequately observed, no one would feel safe about anything, whether his own possessions, the inheritance he expects from his father, or the bequests he makes to his children.

The study and knowledge of the universe would somehow be lame and defective were no practical results to follow.

A mental stain can neither be blotted out by the passage of time nor washed away by any waters.

In a republic this rule ought to be observed: that the majority should not have the predominant power.