Self-knowledge is like lost innocence; however unsettling you find it, it can never be 'unthought' or 'unknown'.
Most of us have achieved levels of affluence and comfort unthought of two generations ago. We've never had it so good, most of us. Nor have we ever complained so bitterly about our problems.
Value is the most invincible and impalpable of ghosts, and comes and goes unthought of, while the visible and dense matter remains as it was.
What goes unsaid eventually goes unthought
A student may easily exhaust his life in comparing divines and moralists without any practical regard to morals and religion; he may be learning not to live but to reason. . . while the chief use of his volumes is unthought of, his mind is unaffected, and his life is unreformed.
What was once thought can never be unthought.
The brain is a muscle of busy hills, the struggle of unthought things with things eternally thought.
Once you put a thought into the world, it can be disagreed with, but it can't be unthought.
