In such placidity, dissolution of all sorrows takes place. For one with a placid mind, the intelligence soon becomes poised, steady.
Placidity of the mind has the power of allaying all sorrows and torments. Agitations and conflicts become extinct with inner placidity.
Remember Arjuna’s confession, “My senses are being scorched by overwhelming grief” (2.8). He wanted Krishna to cool him. See how well Krishna fulfills this need. Through interactional sublimity dawns placidity, which dissolves all grief, torments and turbulence.
The intelligence will no more be shaken by anything, as Arjuna’s was on seeing Bheeshma and Drona heading Duryodhana’s huge army.
The discussion here is about Sthita-prajñā and Sthita-dhee. How well does it fulfil the primary needs of Arjuna, namely cooling his anguish and making him steady-minded! Mind’s placidity has the quality of making the intelligence stable and poised.