Shall I tell you what knowledge is? It is to know both what one knows and what one does not know.
ConfuciusThe failure to cultivate virtue, the failure to examine and analyze what I have learned, the inability to move toward righteousness after being shown the way, the inability to correct my faults-these are the causes of my grief.
ConfuciusIf language is not rectified, words do not correspond to meaning, and if words do not correspond to meaning, our deeds cannot be accomplished.
ConfuciusThere are three friendships which are advantageous, and three which are injurious. Friendship with the upright; friendship with the sincere; and friendship with the man of much observation: these are advantageous. Friendship with the man of specious airs; friendship with the insinuatingly soft; and friendship with the glib-tongued: these are injurious.
Confucius