Eight Limbs of Yoga, Yama, Niyama, observances, Patanjali, yoga moral rules, Shaucha, Purity, Tapas, Self-discipline, Ascetism, Santosha, Satisfaction, Contentment, Svadhyaya, Self-reflection, Ishvara Pranidhana, Devotion, self-development, self-imrpovement, ethical rules.