Adi Shankara

“ Sloka #8 Translation Therefore the man of learning should strive his best for Liberation, having renounced his desire for pleasures from external objects, duly approaching a good and generous preceptor, and fixing his mind on the truth inculcated by him. ”

“ Sloka #4 Translation The man who having by some means obtained a human birth, with a male body and mastery of the Vedas to boot, is foolish enough not to exert for self-liberation, verily commits suicide, for he kills himself by clinging to things unreal. ”

“ Sloka #9 Translation Having attained the Yogarudha state, one should recover oneself, immersed in the sea of birth and death, by means of devotion to right discrimination.
Yogarudha state — Described in Gita VI. 4. — "When one is attached neither to sense-objects nor to actions, and has given up all desires, then he is said to be Yogdrudha or to have ascended the Yoga-path." ”