It is estimated that we have over 50000 thoughts a day-positive, negative, frightening enlightening or just crazy thoughts. They can be triggered by:
Flashbacks (memory) and visual images.
Words, snippets of conversation (even from childhood).
Familiar and unfamiliar objects, scenes, patterns, problems, tasks and people.
Emotions-curiosity, anxiety, regret, anger, sadness and simple doing nothing.
sometimes we thoughts or they simply leap into our minds unexpectedly. we accept, question, challenge or discard them. some tumble around in confusion, become exaggerated and irrational, causing anxiety and mental paralysis.
Thinks is healthy. We need to think to understand, to learn and to progress, and to collect and assimilate information before deciding waht to do with it.
But, the thinking process needs to be managed and channelled constructively.