Noun
one of the seven preeminent virtues
Source: WordNetPeace, though beloved of our Lord, is a cardinal virtue only if your neighbors share your conscience. David Mitchell (author)
Humility is not something that comes naturally. But it is a cardinal virtue that should be pursued more than any other. Joyce Meyer
Contempt for failure is our cardinal virtue. Steven Pressfield
The cardinal virtue of a teacher (is) to protect the pupil from his own influence. Ralph Waldo Emerson