5.

Those who maintain that he who has one virtue has all, and that he who lacks one lacks all, reason correctly from the fact that prudence cannot be cowardly, nor unjust, nor intemperate; for if it were any of these it would no longer be prudence. Moreover, if it be prudence only when it is brave, and just, and temperate, assuredly wherever it exists it must have the other virtues along with it. In like manner, also, courage cannot be imprudent, or intemperate, or unjust; temperance must of necessity be prudent, brave, and just; and justice does not exist unless it be prudent, brave, and temperate. Thus, wherever any one of these virtues truly exists, the others likewise exist; and where some are absent, that which may appear in some measure to resemble virtue is not really present.