Verse 35

अङ्कुशेन विना मत्तं यथा दुष्टं मतङ्गजम् ।अध्यात्मविद्याधिगमः साधुसङ्गम एव च

In plain words

-- just as a vicious, rutting elephant cannot be, without a goad. The attainment of adhyātmavidyā, and the company of the good as well,