From this story two lessons may be drawn:

The first is, that if common sense indicates that judgment should not
change from scorn to enthusiasm, when it is a question of the same
object, practical sense insists that one should be certain of
impartiality of judgment, by avoiding the influence of questions which
relate to environment and surrounding circumstances.

The second concerns opportunity.

We have already had occasion to say how much some things, which seem
desirable at certain times, are questionable when the situation changes.

Bad humor creates ill-will; therefore it is abominably stupid to
provoke the manifestation of the second when one has proved the
existence of the first.

In order that there may be a connection between the faculty of judgment
and that of deduction, it is essential that nothing should be allowed to
interpose itself between these two phases of the argument.

Harmony between all judgments is founded on common sense, but it is
practical common sense, which indicates this harmony with precision.

It is also practical common sense which serves as a guide to the orator
who wishes to impress his audience.

He will endeavor first to choose a subject which will interest those who
listen to him.