When the intelligence is still in samādhi, then it is called yoga.Due to the stability of mind in samādhi, samādhi is considered supreme.

Svātmārāma offers a circular but profound definition here.Yoga is when buddhi (discriminative intelligence) remains niścalā (motionless) in samādhi.And samādhi is supreme precisely because the mind (citta) is sthira (stable, firm).

This apparent tautology points to something important: yoga and samādhi are not really different.Yoga is the process;samādhi is its consummation.But at the moment of realization, the process and the result are revealed to be identical.There is no separate path from the goal.

The Bihar School distinguishes between buddhi (intelligence) and citta (mind).Buddhi is the faculty of discernment;citta is the total mental field.When both are stabilized, the yogi experiences samādhi.The immobility described is not rigidity but the vibrant stillness of a rippleless lake: perfectly clear, perfectly receptive, perfectly at peace.