नास्ति बुद्धिरयुक्तस्य न चायुक्तस्य भावना | न चाभावयतः शान्तिरशान्तस्य कुतः सुखम् ||
Nasti buddhir ayuktasya
Without control of the mind, there is no wisdom; without wisdom, no meditation; without meditation, no peace; and without peace, no happiness.
Modern Application: Peace is the foundation of happiness.
Deep Wisdom: Krishna defines a chain of well-being — control → clarity → peace → happiness.