Some (perform sacrifices) by (concentration of) the mind, some by speech (recitation of hymns); and some by acts (the real ceremonies); but the man who is destined to attain to the true object, gets a true knowledge of self through the proper means.
मनसान्यस्य भवति वाचान्यस्याथ कर्मणा। संकल्पसिद्धः पुरुषः संकल्पानधितिष्ठति॥