If It's Just A Thought, Why Does It Feel So Real?
It feels real because our brains don’t make the difference between imagination and reality. If we think stressful thoughts, the brain will start to produce ‘fight or flight’ chemicals such as adrenaline & cortisol. This is why when stressed, we are at high alert, why our breathing might speed up, blood pressure goes up etc. If we think positive happy thoughts, the brain produces chemicals such as seratonin, which makes us feel good.
If a thought comes to your head, you experience the feeling that goes with that thought, and it can seem very real. The more conscious you are of where your experience is coming from, the more you do something about it if you aren't feeling good. Whether its visualisation, affirmations or mindfulness or meditation. We are talking about playing with our imagination, nothing more, nothing less.