In this higher realm, justice consists in directing the action of the soul towards intelligence; temperance is the intimate conversion of the soul towards intelligence; courage is the (suggestive fascination) or impassibility, by which the soul becomes similar to that which it contemplates; since it is natural for intelligence to be impassible. Now the soul derives this impassibility from the virtue which hinders her from sharing the passions of the lower principle with which she is associated.

EVEN THE LOWER VIRTUES ARE MUTUALLY RELATED.

Plotinos: Complete Works, v. 1 — Part 152

7. Within the soul the virtues have the same interconnection obtaining within Intelligence between the types superior to virtue. For Intelligence, it is thought that constitutes wisdom and prudence; conversion towards oneself is temperance; the fulfillment of one's proper function is justice, and the intelligence's perseverance in remaining within itself, in maintaining itself pure and separated from matter, is analogous to courage. To contemplate intelligence will therefore, for the soul, constitute wisdom and prudence, which then become virtues, and no longer remain mere intellectual types. For the soul is not identical with the essences she thinks, as is intelligence. Similarly, the other soul-virtues will correspond to the superior types. It is not otherwise with purification, for since every virtue is a purification, virtue exacts preliminary purification; otherwise, it would not be perfect.

Plotinos: Complete Works, v. 1 — Part 152

THE HIGHER VIRTUES IMPLY THE LOWER; BUT NOT CONVERSELY.

Plotinos: Complete Works, v. 1 — Part 152

The possessor of the higher virtues necessarily possesses the potentiality for the inferior virtues; but the possessor of the lower does not, conversely, possess the higher. Such are the characteristics of the virtuous man.

PRUDENCE TO DECIDE WHETHER IT IS POSSIBLE TO POSSESS VIRTUES UNSYMMETRICALLY?

(Many interesting questions remain). Is it possible for a man to possess the higher or lower virtues in accomplished reality, or otherwise (merely theoretically)? To decide that, we would have individually to examine each, as, for example, prudence. How could such a virtue exist merely potentially, borrowing its principles from elsewhere? What would happen if one virtue advanced naturally to a certain degree, and another virtue to another? What would you think of a temperance which would moderate certain (impulses), while entirely suppressing others? Similar questions might be raised about other virtues, and the arbiter of the degree to which the virtues have attained would have to be prudence.