Self-conceit is the enemy of progress.
Love of money is the mother-city (metropolis) of all evils.
Bion insisted on the principle that "The property of friends is common."
The boys throw rocks at the frogs in jest. But the frogs die in earnest.
Though boys throw stones at frogs in sport, the frogs do not die in sport, but in earnest.
Good slaves are free, but bad free men are slaves of many passions.