भागवतमाहात्म्य - व्यग्रचित्तो हतो जपः

अदृढं च हतं ज्ञानं प्रमादेन हतं श्रुतम् ।
संदिग्धो हि हतो मंत्रो व्यग्रचित्तो हतो जपः ॥

- भागवतमाहात्म्य

adRuDham cha hatam jnAnam pramAdena hatam shrutam ।
sandigdho hi hato mantro vyagra chitto hato japaH ॥

- bhAgavatamAhAtmya

That knowledge that is not firm is useless. Education is ruined if you indulge. If you doubt, you will not get hold on the hymn (spell). A restless mind can not meditate (penance).

- Bhagavata Mahatmya