Patanjali Yoga and Advaita

Patanjali divided his Yoga Sutras into four steps as follows to understand the Monism (Advaita)

1) Samadhi Pada : Understand citta-vritti-nirodhaḥ.

2) Sadhana Pada : Practice citta-vritti-nirodhaḥ.

3) Vibhuti Pada : Realise the relationship between self and outside

4) Kaivalya Pada : Experience Monism thus Advaita