Like it or not, you (yes, you) are a slave to your internal chemistry. No amount of willpower or happy thoughts will cause your hormones or neurotransmitter lev

Like it or not, you (yes, you) are a slave to your internal chemistry. No amount of willpower or happy thoughts will cause your hormones or neurotransmitter levels into the homeostasis you want. If your chemistry is off, your physical and emotional behavior will be off. Define, "off". Who gets to decide what's normal?