There are several types of yoga, but according to ancient texts such as the Bhagavad-Gita and the Yoga Sutras of Patanjali stand out: Hatha Yoga, which refers to the purification of the body through physical exercises. It is the most common because it is associated with various physical practices. Bhakti Yoga is that which is expressed through devotion and adoration to God. Karma Yoga refers to unconditional service to other beings. Gñana Yoga refers to self-knowledge, discernment and the study of philosophical texts. Raja Yoga comprises eight precepts of life to achieve self-realization.