नास्ति बुद्धिरयुक्तस्य न चायुक्तस्य भावना। न चाभावयतः शान्तिरशान्तस्य कुतः सुखम्॥
nāsti buddhirayuktasya na cāyuktasya bhāvanā na cābhāvayataḥ śāntiraśāntasya kutaḥ sukham
Meaning
Right discrimination is not for him who cannot concentrate. Without concentration, there cannot be meditation; he who cannot meditate must not expect peace; and without peace, how can one expect happiness?
English translation by Shri Purohit Swami (1935), public domain. Sanskrit text in the public domain. About Duvidha