high performance mindfulness self-compassion self-knowledge self-care self-sabotage well-being emotional well-being behavior nonverbal communication beliefs limiting beliefs brain personal development design thinking emotions empathy stress physical exercise philosophy hormones spiritual intelligence journaling Martin Seligman meditation microexpressions mindfulness mindset Neuroscience Cognitive Neuroscience Neuroplasticity neurotransmitters neurons overthinking Paul Ekman PERMA NLP productivity purpose positive psychology mental reprogramming resilience mental health Shauna Shapiro success