nasti buddhir ayuktasya na cayuktasya bhavana
na cabhavayatah santir asantasya kutah sukham
One who is not connected with the Supreme [in Krsna consciousness] can have neither transcendental intelligence nor a steady mind, without which there is no possibility of peace. And how can there be any happiness without peace?
[Bhagavad Gita 2.66]