Thought and Thoughts

Where do all these thoughts come from?
Torment-styled and concealed
More than half remains unspoken
The other half of spoken aren't well conceived.
A part of them partly bears any truth
A part is always slurred
The next part stumped in ashes
And a whole of next converted to thoughtless words.
The mere minutest percent that remains
Are ones that make the best discourse
Once in a month, a year, in ages
Unrecorded and subverse.