The boys throw rocks at the frogs in jest. But the frogs die in earnest.
Good slaves are free, but bad free men are slaves of many passions.
The road to Hades is easy to travel; at any rate men pass away with their eyes shut.
Self-conceit is the enemy of progress.
Love of money is the mother-city (metropolis) of all evils.
Though boys throw stones at frogs in sport, the frogs do not die in sport, but in earnest.