Bhagavad Gita · Chapter 2: The Path of Understanding

Bhagavad Gita 2.66

nāsti buddhirayuktasya na cāyuktasya bhāvanā | na cābhāvayataḥ śāntiraśāntasya kutaḥ sukham ||

The undisciplined have no understanding and no power of contemplation. Without contemplation there is no peace, and without peace how can there be happiness?

Modern context

The same chain, stated in the negative, ends in a question worth keeping: how can there be happiness for someone who has no peace? We usually seek happiness directly, through pleasure and achievement. Krishna says it rests on peace, and peace on a disciplined, collected mind. Without that base, no amount of good fortune feels like happiness.