Negativity affects your immune system. Current research in neuroscience suggests that the mind-body connection is real – what we think affects us emotionally, intellectually and physically.
For every thought that you meditate on, there is a physical reaction in your body in the form of electrical current that flows along the nerves in your brain which results in the release of neurotransmitters and the production of various hormones.
A negative thought may seem harmless, but if you meditate on a negative thought long enough, it becomes toxic. It is here when thoughts truly become harmful, emotionally and physically.
Understand that when you are prone to think toxic thoughts of anxiety, fear, self-hatred, self-condemnation, self-rejection, anger, rage, bitterness, unforgiveness, jealousy etc. your body releases chemicals and hormones that are counterproductive to your health and peace. Your brain converts those thoughts into a physical reaction that affects your immune system, mood, etc.
Let’s take depression for example. Depression is a common and serious medical illness that negatively affects how you feel and how you act. Current medications for depression generally work by targeting a certain type of neurotransmitter called monoamines. But the development of these have stalled in recent years, with limited progress made in improving their effectiveness.
And no fundamentally different approaches for new drugs have been discovered in the past 30 years.