Truth means that which actually is, as opposed to lies, incorrect beliefs, fantasies or foolishness, and exists independently of thinkers.

It is therefore correct to say that the senses do not err — not because they always judge rightly, but because they do not judge at all.

an intellectual concept abstracts from everything sensuous, it is not abstracted from sensuous things, and perhaps would be more correctly called abstracting than abstract. Intellectual concepts it is more cautious, therefore, to call pure ideas, and concepts given only empirically, abstract ideas.

From your place of darkness observe the defects of others. See but do not appear to see; listen but do not seem to listen; know but do not let it be known that you know. When you perceive the trend of a man's words, do not change them, do not correct them, but examine them and compare them with the results.

Only while sleeping one makes no mistakes. Making mistakes is the privilege of the active—of those who can correct their mistakes and put them right.

I speak what appears to me the general opinion; and where an opinion is general, it is usually correct.

Failure has been correctly identified as the line of least persistence.