Whatever is difficult of acquisition, difficult to learn, difficult to defeat, difficult to pass through, can all be acquired by penance, for penance is irresistible.
यदुरापं दुराम्नायं दुराधर्षं दुरन्वयम्। तत् सर्वं तपसा साध्यं तपो हि दुरतिक्रमम्॥