Kṛṣṇa describes the result of attaining that state of grace. When a person is internally satisfied and has received divine mercy, all their material miseries are destroyed. This doesn’t mean external problems disappear, but they lose the power to cause suffering to the soul. In such a satisfied consciousness, the intelligence very quickly becomes steady and well-established. Happiness is not just a pleasant feeling; it is the foundation of clear thinking. A happy and peaceful mind can focus on the Absolute, while a miserable mind is always scattered and distracted. Kṛṣṇa is showing Arjuna that spiritual satisfaction is the practical requirement for wisdom. By purifying his heart and senses, Arjuna will find a peace that will make his intellect sharp and unwavering, even in the middle of a war. Inner peace is the mother of steady intelligence.