consciousness

Believing that they possess consciousness, men have not exerted themselves very much to acquire it; and things haven't changed much in this respect. To this day the task of incorporating knowledge and making it instinctive is only beginning to dawn on the human eye and is not yet clearly discernible; it is a task that is seen only by those who have comprehended that so far we have incorporated only our errors and that all our consciousness relates to errors.

Nietzsche The Gay Science §11