5- What are the goals of Yoga?

Yoga 's goals are 3 fold according to Patanjali, one of the greatest sages (2nd to 4th century BC):
1- Tapas: Purification of the body and mind
2- Svadhya: Self study and understanding of our mind's distortion of reality allowing for the understanding of our true nature.
3- Surrender and offering of our actions to the divine.