Withdrawing the senses from their objects, one should fix the mind upon the soul; having previously practised the severest austerities, one should practise that concentration of mind which leads to Liberation.
इन्द्रियाणि तु संहृत्य मन आत्मनि धारयेत्। तीव्र तप्त्वा तपः पूर्वे मोक्षयोगं समाचरेत्॥