Our entire extistence and experience is nothing _but_ input.
Temperature changes, visual stimulus, auditory stimulus, body cues, random thoughts firing, etc.. Those are all going on all the time.
Temperature changes, visual stimulus, auditory stimulus, body cues, random thoughts firing, etc.. Those are all going on all the time.
I don't choose to think random thoughts they appear.
Which is different than thoughts I consciously choose to think and engage with.
From my subjective perspective it is an input into my field of awareness.