Thoughts in Space

Thoughts travel in and out of space and I wonder if we pick and choose.  Some are so fleeting, we hardly ever notice.  Here one moment and gone the next. They are the forgettable ones.  Ah, but then we have the thoughts that grab us and pull us in to their web of lies.  Of course, it all sounds good; believable even.  That is exactly our perception of life, ourselves and the world.  It is difficult enough to fit in.  Sadness surrounds our being.  Sometimes a happy thought gets caught up in the strands, but Pouf, that thought is gone.  

How do we save the interwoven goodness of the cotton candy swirls?  Why do they disappear so fast, but we hang on to the self-defecating web-like bits of useless and erroneous thoughts. I have no answer to these questions, but I will put it out to the world to answer if they feel so inclined.  Answers anyone?