Day 4 Sutra 1:2 “Yogas Citta Vrtti Norodhah”The Restraint of the modification of the mind stuff is Yoga.
When the mind is still and the chattering thoughts that disturb peace are restrained, that is yoga; you experience yoga.
The word yoga means “union”. In my experience, when the thoughts that rise up in the mind are controlled and you are in yoga everything becomes one and your faculties also sharpen. You dwell in a place of joy, love, peace...all just happening in the now. There is no separation.
Short exercise: Right now watch your thoughts. Notice what happens
Here's a link to a video that tells you more...
https://www.youtube.com/watch?v=K-i9Q9TB-bY
Tomorrow – Why control the thought forms...What's in it for you?