Yogaḥ Samādhiḥ / Yoga is Samādhi
– Sage Vyāsa
Saṁyama is a process of meditative analysis. It aides in the development of the faculty of discrimination or Viveka-Khyāti. And the faculty of discrimination is the means to liberation from bondage and suffering.
Saṁyama is a way of directing attention on an object or a specific feature of an object in order to understand it correctly. Correctly here means to see an object for what it is, uninfluenced by one’s biases and conditioning. Correct understanding helps in renunciation of those objects that ensnare us in a cycle of attachment and suffering.
In other words, Saṁyama is the essence of Yoga.