One of the popular and scientific indian philosophy method. It's a Royal path of attaining self realization or enlightenment. Introduced by patanjali maharishi.

Raja yoga philosophy had spread to the west through swami Vivekananda’s teachings .Following the Yamas-Niyamas are
the foundation of Raja yoga . Those who practice yoga without following yama- niyamas they are just yoga asana practitioners and not a Yoga Practitioner Patanjali described eight limbs of yoga as:-

• Yama
• Niyama
• Asana
• Pranayama
• Prathyahara
• Dharana
• Dhyana
• Samadhi
• Yama & Niyamas are purify the mind and body
• Asana will strengthen the body
• Pranayama offer  inner lightness
• Pratyahara will calm the mind
• Dharana offers concentration
• Dhyana offers  inner perception.
• Samādhi offers self liberation and bliss