We know the cardinal virtues, which were already praised by philosophers long before Christianity, notably by Plato and Aristotle: prudence, temperance, justice and fortitude. In this Licorne (Unicorn) n°20, I suggest you examine this curious virtue: strength. Sometimes referred to as "virtus", sometimes as "fortitudo", it seems to be the pivotal virtue of all the other virtues.

Leonardo da Vinci was born on April 15, 1452, in Tuscany, to a notary father and a peasant mother who left her son with his natural father, who raised him along with his nine brothers and two sisters. The mother was forbidden to see her son. His grandfather was also a notary. Leonardo da Vinci did receive an education, but it was very limited: he learned to read in the vernacular and would only study Latin later, as an autodidact. It seems that Tuscan nature served as his mot