One verse

Bhagavad Gita 2.66

2.66

नास्ति बुद्धिरयुक्तस्य न चायुक्तस्य भावना | न चाभावयतः शान्तिरशान्तस्य कुतः सुखम् ||२-६६||

nāsti buddhirayuktasya na cāyuktasya bhāvanā . na cābhāvayataḥ śāntiraśāntasya kutaḥ sukham ||2-66||

buddhiḥ
transcendental intelligence
ayuktasya
of one who is not connected (with Kṛṣṇa consciousness)
na
not
ca
and
ayuktasya
of one devoid of Kṛṣṇa consciousness
bhāvanā
fixed mind (in happiness)
na
not
ca
and
abhāvayataḥ
of one who is not fixed
śāntiḥ
peace
aśāntasya
of the unpeaceful
kutaḥ
where is
sukham
happiness

One who is not connected with the Supreme [in Kṛṣṇa 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?